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Have you ever wondered what these extra holes at the top of your running shoes are for? They're designed so that you can tie the shoes in multiple different ways. That's useful when you want to compensate for things such as a bad stride or even a damaged toe. Plus, you can change the look of your shoes the way you prefer. Many people use a dust jacket of their book as a bookmarker. No problem with that. It will save your book from bent page corners. But the primary purpose of a dust cover is to keep the book safe from distortions. For instance, if you spill juice or drop some of the food on your book while reading it. The Tic Tac dispenser has this little groove on its top. So, you can dispense only one Tic Tac at a time. Even though,
let's be honest here, nobody does that. Most of us just spill a whole bunch at once and then we wiggle all those extra Tic Tacs back in. Those rubber bumps you see between the tire treads are there for your safety. The raised edges tell you what the minimum height of your tread is. If the bump and the edges are even, it's time for you to visit the tire shop as soon as possible. But if the bumps are well beneath the level of the edges, you're good to go. What about that black grading on the microwave window? It's something called a Faraday shield, and it's there to prevent microwaves from getting away and
turning the entire room into a Faraday cage. If the microwaves escape, your meal won't cook properly, either. So, yep, the cage is not there to make it difficult for you to see your meal while it's cooking. It's keeping the electromagnetic energy inside. How about a wrench compatible screwdriver? Cover your screwdriver with the end of your wrench and you can increase its torque. That's why the head of your screwdriver is designed the way it is. When you have odd angles, you can use this strategy. You've probably heard those myths, the blue side of the eraser can erase the pen. False. Its purpose is to erase a pencil. But in case you're writing something on heavier paper, the blue side can remove smudges you see after using the pink eraser, too.
Have you ever wondered why oranges in supermarkets mostly come in the red mesh bag? It's a trick to make this food look more orange and encourage you to make a purchase. An extra tip, don't throw away the mesh bag. Tie it up so you can have a small pot scrubber to clean your sink, kitchen, appliances, and dishes. You can see golf balls don't have a perfectly round shape. Their surface is covered with many little dimples, something golf balls didn't always have. At one point, experienced golfers started noticing how through time, older balls with imperfections, such as nicks and bumps could travel further. Such things create turbulence in the air around the golf ball, which eventually reduces drag. So, manufacturers started
producing balls with dimples so they could go farther and faster. You might have noticed that sometimes there are ridges in toothpick tops. It's more hygienic because when you break that off, you can prop the toothpick up on it and it won't touch anything. Another safety feature you'll find this time in your car is a tab on your rear view mirror. With it, you can change the position of the mirror so you don't get blinded if there's a car behind you with its high beams on. So, this little tab helps you control the glare of lights coming from behind. This feature showed up in the 1930s, but in the early 1970s, it became a part of standard equipment in most trucks and cars.
Do you see that tiny hole on your iPhone right next to the rear-facing camera? It's a microphone, and it's there so your phone can record sound as you turn your camera around. Some cables have a thick cylinder towards the end of the cord. It's called a fite core or a choke. It's a magnetic iron oxide that stops highfrequency electromagnetic interference. For example, you know that annoying static noise you get if you bring your phone too close to a speaker. This interrupts your call, which is why cable cords with big cylinders are pretty useful because they prevent these things.
Do you know why nearly all luggage bags and backpacks have two zippers? It's way more convenient and easier to open in that way. But not just that, you can also lock these two zippers together to keep the stuff inside your bags safer. You know how toilets at public spots like malls have those big gaps at the bottom? It's primarily for better circulation of air. This type of door also makes it easier to clean the toilet or check if it's occupied if you're standing in line. Other than that, if you get stuck there and the lock gets broken, you still have a way to escape. You can just crawl out.
Ever notice those plastic end caps on utility knives? And they also have scales on them, which indicates you may use them multiple times, but with sharp edges. You can separate the blades through these plastic end caps. Then you can move the slider and bring the sharp blade to the front. If you've ever taken a moment to examine a regular grocery cart, especially their foldout section, you probably notice those metal loops jutting out. They're designed to protect the items you carry in your cart. You can use them to hang bags with soft items. You don't want to accidentally squish with heavier products like bread or easily breakable things like eggs.
Many coffee mugs come with curved notches on their bottom. When you're washing your mugs, put them against the rack at an angle in your dishwasher. This way, the water won't pull in there, so your favorite cup will be completely dry by the time you take it out of the dishwasher. If you're a McFlurry fan, you've probably noticed there's a square hole in the handle of the spoon. It's there so you can attach it to the special machine that mixes the ice cream and your favorite toppings together. The machine has a bar that slips into this square shaped spoon and then thoroughly stirs it. And you get the spoon so they
can minimize the mess during the process. Quite neat, wouldn't you say? A regular milk jug has a dent on one side. Some might see it as a random design decision, but a dent has several purposes. One of them is to get bigger if there's a gas buildup. This happens when your milk is spoiled. So, you don't even have to try to check this out. Also, the dent is there so the jug doesn't burst if you accidentally drop it. The dent allows the expansion space that deals with the sudden pressure that happens when you drop the jug. Dental floss. Sure, it's important for your dental health, and it's easy to assume what you do with it, but dental floss is great in the kitchen as well
because it's a very precise cake slicer, way better than a regular knife. Most kitchen shears have a serrated opening right there at the center where the blades and handles meet. It's something you can use to trim difficult herbs such as rosemary, thyme, or chives. Because of this opening, you don't need to pick the leaves off by hand, but de stem them in one motion. The majority of gelatin containers or single serving yogurts come with a tin foil lid. And in most cases, you can use this covering as a disposable spoon. Just peel away the covering, and after a couple of simple folds, you'll have a perfect little spoon for your midday snack.
The Queen's Guard all appear to have the same uniform with a shared role of standing stoically for a long time. But if you look closely at their hats, there are five different types. The Grenadier has a white plume. The Cold Stream has a red one. The Irish a blue plume, the Welsh green and white, and the Scots Guard has none. There are different divisions perform similar ceremonial duties at Buckingham Palace, but they have other actual roles as well, suited to their specialization. When peeling your boiled eggs, you can see a hidden layer under the shell.
These two membranes, an inner and outer one, are made from the same stuff as your hair, keratin. It protects the inside from bacteria and stops liquids from escaping. You use X in your text which represents a kiss. It's been used this way for a very long time. Its original purpose dates back to the Middle Ages where it was a representation of a person's faith, honesty, and sincerity. Those that would sign off with an X would kiss it after signing as a display of a sworn oath. The X's meaning later changed to represent the action of kissing. And the first document showing this was a letter dating back to 1763 written by a
naturalist Gilbert White who sent it to his wife. William Shakespeare is a name familiar to everyone. However, we don't know whether this was the actual way his name was spelled and neither did he. He signed 80 different variations of his name spelling on all his works. Historians haven't a clue which the correct spelling is. The version that we know of was only used on two of his plays. Different forms of alarm clocks were invented as far back as 348 BCE. With many versions throughout the world, all with complicated mechanics unaffordable to mostly everyone, they didn't catch on. Alternate methods to wake up in the
morning started to be used in the 1800s. One process involving knocker uppers was common in some countries. A person visited your house every morning to knock on your door four times. Inventor Antoine Redier felt that he should be woken only when he felt it necessary. So in 1847, he invented the first adjustable alarm clock. Tennis balls in Wimbledon must be kept at a perfect temperature to ensure they bounce at a consistent level. They're stored at 68° F, so they're cold enough that the molecules inside the ball shrink, ensuring they bounce lower.
Then they're continuously swapped throughout a match as they expand by being hit too much, becoming too bouncy. Wimbledon goes through 50,000 tennis balls each year. You enjoy the smell of a freshly mowed lawn, as you associate it with the weekends and summer. But that smell is a sign of stress made by the grass. Grass evolved to emit various elements when being eaten by bugs. This signal attracts predator insects to remove them. But unfortunately for the grass, there's nothing large enough to deter a lawn mower.
There is no oxygen inside your packet of chips. If there was, it would influence the combination of molecules forming inside, spoiling the chips faster. The packets are instead filled with nitrogen which pushes oxygen out and this extends the shelf life and quality of your chips. You're traveling by plane overnight and just can't get to sleep. And the first night in a hotel wasn't great regardless of how comfy the bed was. This is because of a human evolutionary trait called the first night effect.
When you sleep in a different place than your home, the left side of the brain responds to more sounds while you're asleep. It continues to analyze your surroundings without you realizing, acting as though it's on a night watch and keeping you alert for any potential dangers. Most animals have this trait, although it's a lot more subtle in humans, but it's still effective enough to make sure you get your peanuts. Before playing basketball with hoops, you would have instead been playing with peach baskets. When the game was invented in 1891, a peach basket was used with the bottom of it cut off. But it only took 15 years for players to grow tired of constantly collecting the
jammed balls and to remove the basket altogether. When you click your fingers, the snapping sound isn't from the physical click of finger and thumb. The noise actually comes from the finger hitting the palm. The instant film for the first Polaroid cameras didn't have their own coating after taking a photo. To develop it, you applied it yourself. Waiting for it to dry took a long time. So, shaking it sped up the process. Then, from the 1970s, the film provided everything required for the photo to develop, making the popular craze of shaking Polaroids pointless.
Shaking the photo can cause the ink to wave or blur before drying properly. So, you shouldn't actually shake it like a Polaroid picture, and just wait patiently instead. Bug spray doesn't repel all bugs, especially the worst of them all, mosquitoes. It does cover the scent of carbon dioxide, which is what attracts mosquitoes, but the spray only protects you for a short distance. Mosquitoes can also track carbon dioxide over long distances. They will continue to stalk you until they find a gap in your invisible bug shield.
A great alternative is lavender, which contains linolu. This fragrance completely overloads the mosquito's senses, making it unable to track you. The half belt on the back of some jackets appear like a fashion accessory. It was initially designed that way for larger jackets as they could also be used as a blanket to wrap around oneself. The belt's position helps hold the material together so it's easier to walk with whilst keeping you warm. Ketchup wasn't originally intended to be your favorite condiment. In 1834, a physician John Cook sold ketchup as a cure for indigestion.
It was an immediate hit and today 10 billion ounces are purchased annually in the USA, although not as the intended medicine. Thomas Edison made over 1,000 inventions, and one in particular, the light bulb, is most famously linked to him. However, he didn't actually invent it. Warren Delaroo, a British chemist, had solved this scientific challenge 40 years earlier. There were also 20 other inventors who made alternate versions before Edison did. But earlier varieties relied on cotton thread and only lasted up to 14 hours. Edison in 1880 used a carbonized bamboo thread instead and his
worked up to,200 hours. It became the most commercially viable light bulb and today's ones are similarly shaped to Edison's original. The first treadmill was used in England in 1818. It was a large wooden cylinder with a handrail, although it wasn't used to keep fit. Convicted criminals would be forced to use these for up to 10 hours per day as a punishment. The energy output potential was realized and soon it was built to work with water pumps and grain grinders. It was so effective that it was used in all prisons throughout the country. But in 1902, it was decided that it was too
harsh and stopped. And now this cruel punishment is mainly found in gyms. During the 1940s, there was a shortage of cocoa. And it was important to find a solution to this problem. A production company found a way by mixing only a small amount of cocoa with hazelnuts and milk, and the original Nutella was created. It started out as a loaf spread, like a stick of butter. It then transformed into a creamier version inside a jar in 1951, but it wasn't until 1964 that it was given its famous name. Your passport might be a dark shade of either green, blue, or red. The darker color not only makes them appear more official, but is intended so that through its journeys, the dirt that's collected is more easily hidden.
Wasabi was first used back in the 8th century. It wasn't meant as a spicy condiment as it's served with sushi today. Initially, it was used for its antimicrobial properties that help avoid the harmful reactions to fish with sushi that's a bit too old. Many shirts have two buttons on the cuffs, but only one button hole. So, what is the second button for? Turns out you can use it whenever you're wearing a watch, so the cuff is looser. Most clothing items you buy come with a small bag of fabric or a button or both. Buttons obviously can be used as a replacement if you lose the original ones. Pieces of fabric can be used to patch up a hole, but most importantly,
it's a tester. You can use it to test different washing products on it and see what happens to the fabric. Some umbrellas have a tip at the top. And it turns out it's not just a pretty design. When going inside on a rainy day, you should just close your umbrella and tap the tip against the floor to drain the water faster and more effectively. Many backpacks have this diamond with two parallel cutout slits on its front, and it's there for your comfort. You can attach something to it, like a water bottle or shoes. It comes especially handy if you travel somewhere or go
hiking, so you don't have to hold your stuff. Okay, the next thing is gear loops. And probably from the name of it, you already have an idea what they're there for. You can strap in some useful gear you need to have with you, like trekking poles or shovels. Some gear will need to be secured to do it. Drop the handle through the loop and rotate it upward. Then secure it with the elastic hook at the top and you're golden. On the back of many makeup and hygiene products, you can find this symbol with a marking like 6 M, 12 M, and 24M. This is the number of months this product can serve after you open it and before you should throw it out.
The two sides of a cotton pad are different because each of them has a particular purpose. A cotton pad has several layers to ensure that it's soft, strong, and can absorb liquids. The edge is stitched to hold it all together. The smooth side of a pad is for applying products like tonics and lotions. And the embossed side is best for cleansing and makeup removal. Also, any pack of cotton pads has those strings on the sides. They're there so you can hang the package somewhere. Then you can open the package at the bottom where the perforated line is and take them out.
Did you know that there is an efficient way to pull a thread from yarn? When you pull from the outside, the yarn rolls away, so you need to hold it. However, if you pull it from the center, it will stay together. We're all familiar with staplers, but I bet you don't know all its secrets. Most staplers have a compartment to store spare staples which can be located either on top or at the bottom. Also, surprise, this metal plate you press staples against can be turned around. This way, the device will be able to staple your documents by turning the metal ends outwards.
No need to wonder whether you need to get a smaller or bigger container. Turns out plastic food containers have volume measurements on their bottoms indicating how much food they can fit. Ceiling fans come with a small switch on the inside of the blade. You might not have noticed it because it's not in plain sight, so check yours out. This switch allows you to change the direction of rotation. Now, why would you want to do that? The blades of a fan push the air in different directions depending on the way they rotate. In the summer, you need the air to be pushed down to create the effect of a breeze. In the winter, the direction should be
changed so that the air is pushed towards the ceiling. It then heats up before going down the walls. Have you noticed that the gas tank sign on cars dashboards has a little arrow next to it? Well, this arrow has a purpose. It points at the side of the car where the gas tank is located. It's very useful for forgetful people who constantly wonder where their gas tank is and also for those who drive rentals once in a while. The answer is right in front of your eyes. If you can't find the arrow on your panel, then the fuel hose on the icon indicates the side instead. All car tires have 12digit numbers printed on them, and they're actually important codes for car owners if they want to get the right tire.
The first letter identifies the type of tire. P stands for a tire for light passenger cars and LT is for heavy vehicles. Then the following numbers stand for the width of the tire, its radial, and its diameter. Measuring tapes have that metal stud on the end, which you can use to attach the tape to the surface you measure. This way, you don't need to hold it yourself. But there's also a small slot which can be used to hang the tape on a nail again to free your hands and keep measuring. The bottom of the end of the tape has a riged edge. It will help you make a mark if you don't have a marking tool with you. On the tape, there are black diamonds that are placed every 19.2 in. They're
useful for construction workers when spacing engineering joists. They can also be useful for you if you want to hang something heavy, for example. The diamond will mark the exact center of a wooden joist. Those are placed 16 in apart from one another. There, you can drill something to that center to make sure whatever you hang is safely attached to the joist instead of the unreliable thin wall. Pictures will survive, but it's particularly important if you're hanging something heavy. Did you know that batteries have an expiration date? Yes, it's printed right on their label, but I've never noticed it before. The expiration date doesn't mean you can't use it after that. It's more like a recommended usage period,
after which the manufacturer can't guarantee full battery life due to deteriorated components. These little feet keyboards have are actually a standard. The height of a keyboard should be adjustable, allowing the angle between 0° and 15°. The reason to fold the feet out is for you to see the keys better in case you don't type blindly. A little problem that comes with it is that in this case your wrists are bent and it's not good to keep them in this position for a long time. Pans have those holes on the ends of their handles. They're not just there for you to hang them. You can also place your cooking spoon in there. It'll hang right above the pan and the sauce will not spill around. Make sure to tap off
the sauce or food beforehand, though, so that it doesn't go down the spoon's handle. Stickers with numbers you can find on fruits can tell you some information on how the food was grown. A four-digit code that starts with a four means that the fruit was grown conventionally, meaning it contains chemicals and pesticides. So, your best choice should be a fruit with a five-digit number. And if you see the number nine, it indicates that the fruit is certified organic. On the bottom of plastic bottles, you can often notice a mark of a triangle with a number engraved in the middle. This number specifies the type of plastic that was used to produce the bottle. These codes help people and
local recycling centers to sort returns. Products that were made of plastic of types 1 and two are the easiest ones to recycle. Plastics of types 3 through 7 are tougher to recycle. If you look at it on the street, you'll think a fire hydrant is about 3 ft in height. But the actual size of the device used to provide water supply to firefighters all over the world is twice as large. That is if you count the rest of the hydrant which is hiding underground. They're mostly red and it's not just a matter of urban design. First of all, they need to be of bright, easily noticeable colors so firefighters
can spot them fast when they need to. The choice of color depends on how much water the hydrant can hold. It can sometimes vary depending on the location, but here's the breakdown. A red fire hydrant can splash 500 gall of water per minute, while an orange one, at least 1,000 gall. Green ones mostly process 1,500 gall of water per minute. And the most plentiful ones, colored blue, can generally contain over 1,500 gall. Hey bowling fans, isn't it super annoying when your bowling ball gets cracked? Turns out that most of them get damaged because of incorrect storage or spikes in temperature.
Now come on and face it. Since it's already cracked a bit, aren't you curious what's actually inside the bowling ball? Cuz I sure am. Let's have a look. They mostly make the inner core of the ball of powdered metal oxides like calcium or iron oxide. Then mix them with some resin and catalyst to harden the whole mixture. So that light bulb shape you now see inside of the ball is actually its heaviest part. It also influences how your bowling ball rotates when going down the lane. The same goes with spray paint cans. When you shake it, it makes a weird noise. But what is that thing in there? It's called a pee, and it's meant to hold the paint mixture in place and maintain its shape. They generally make
it out of plastic, metal, or ceramic. It basically acts as a whisk to make sure your paint is well mixed together before you apply it to your surface of choice. Ever wondered how soda bottles keep that refreshing fizz for that long? Well, they have a little plastic ring fastened to the lid. They place it there to keep the gas from escaping and making the soda go flat, even if you shake it around in your bag the whole day. Speaking of things we use on a hot summer's day. Wait, wait, don't put your baseball cap on just yet. Take a look at it for a minute and you'll notice there's a small button on the very top.
Is it functional or is it just there for the sake of design? Way back when people started using fabrics to cover their heads, some say the button was actually functional. Since it's on top of the cap where the fabric panels come together, the top button helps keep the cap crown in one single piece. Now, with recent advances in fabric and pattern design, the button is more of an aesthetic feature. It's used to cover up the joint point of the fabric panels. Your cap might not have a button at all, but don't you think a cap actually looks better with one? Cotton pads have two sides, and if you take the time to look at them carefully, they're actually different in texture. Just in case you've ever wondered why, the textured
side is for applying makeup, and the even side is for removing it. Bookworms, this one is for you. Dust jackets that come with a lot of hardcover books are not just meant to make your book look pretty, they also double as a bookmark. Just fold the pages you've already read underneath the inside of the jacket, and voila. Next time you reach out for your favorite shirt, take a look at the top button hole. It should be stitched horizontally and all the other ones are vertical. Turns out that the dress shirt was designed this way since the first and the last buttons were the first ones to unbutton throughout the day. They then changed the direction of the button hole to ensure the shirt would stay nice
and fitted before you're ready to take it off. These days, we have so many variations of this awesome dessert that it's hard to imagine we've ever lived without it. You can find different types of cookie dough ice cream or even chocolate chip cookie cake basically everywhere. But the famous cookie wasn't actually invented until 1930. The story goes that a woman named Ruth Graves Wakefield was preparing some chocolate cookies as she was waiting for some guests to arrive. She soon figured out she was out of baker's chocolate, a crucial ingredient for the classic cookies. To fix things up, she chopped up a block of semieet
chocolate, thinking it would eventually spread out evenly throughout the batter given the heat of the oven. Things didn't necessarily go as planned. But hey, it's great they didn't because this is how she invented this modern dessert we now can't get enough of. And speaking of popular snacks, the potato chip is even younger than the chocolate chip cookie. Well, at least historically. There are many stories trying to explain how it was invented. One of them goes like this. A chef named George Crumb based in New York put the chips together in 1953. He decided to try a different cooking solution when one of his customers didn't have nice things to say about his French fries. He said they were too
thick and kind of mushy. ThenRum came up with potatoes that were thinly sliced and fried until brown. People absolutely loved the dish and they welcomed the first ever batch of chips with open arms. Ice cream, anyone? If the story is true, back in 1904 at the St. Louis World's Fair, one ice cream shop owner ran out of cups to serve his dish. So, he fashioned a waffle into the shape of a cone, and the rest was history. Okay, I'll admit it. Chewing gum, like treats, have been around since the ancient Greeks. So, this one isn't particularly a revolutionary discovery, but the actual gum we buy today wasn't there until the late 1800s.
An American inventor named Thomas Adams wanted to mix together different chemicals to create rubber. He tried and failed for that matter to play with chle for his experiment, but ended up fashioning this neat treat. They still use to this day to produce most chewing gums. Back in the 1800s, there lived a man named Jean Baptiste Jolie who worked in the fabric industry as a textile maker. How he came up with this next invention that we use a lot these days has less to do with him and more to do with his maid. The story goes that the woman accidentally knocked a kerosene lamp over onto a tablecloth. Instead of
getting upset over the damaged fabric, Jolli noticed that the substance actually made the material cleaner. Figured it out yet? Yep. That's how the idea for the very first dry cleaner popped up. A very neat accident, if I do say so myself. Now, this one I loved. Did you know matchsticks were initially called friction lights? Or at least that's how their inventor, a chemist named John Walker, called them back in 1826. He scraped a stick coated in chemicals across his hearth totally by accident one day and realized that they ignited and created a spark. Initially made out of cardboard, they were then made using wooden splints and sandpaper.
Back in the 1940s, a man named Harry Coover stumbled upon a chemical formulation that seemed to stick to everything it touched. The scientific community at the time didn't look much into it as the formula didn't seem to have many applications back then. It wasn't until 1951 that he looked a bit more into the formula and decided to repurpose it along with a fellow Eastman Kodak researcher named Fred Joiner. They gave it a proper full name, but you must know it by the shorter version. Superglue. It also has many uses in security these days that it's hard to believe that we didn't come up with this one on purpose.
Back in 1903, a scientist named Edward Benedictus knocked over a flask by accident. He looked down and was amazed to see that the glassware had just slightly cracked but maintained its shape. He was expecting it to break into a million tiny pieces. Curious about this hidden feature, he looked into it and figured out what was keeping the glass together was a substance coating the inside of the glass. Tada! That's how humanity came up with safety glass. Various types of cheese have holes for a reason. For example, Swiss cheese is made with special bacteria that produce carbon dioxide. As the CO2 is emitted, it blows like bubble gum, leaving tiny craters, also known as cheese eyes. Then
the cheese is cooled down, but the holes stay in place. Over 40 billion Oreos are made every single year. It's the world's most popular manufactured cookie. The geometric design stamped onto these cookies has the Nabiscoco logo, the symbol of European quality surrounding the word Oreo. William Turnier created the chocolate cookie design we see today. back in 1952. If you use reusable bottles, you probably know that sometimes they smell. Even if you only use it for regular water, it still smells. But it's not the water that smells. It's the microorganisms in it. If you drink water from a bottle, the particles of your saliva and sweat stay in there. Those bacteria start to build up in the
bottle, causing the smell. So, if you choose reusable bottles, make sure to wash them every day to prevent those bacteria from building up. After washing, let it dry completely before using it again. Not only are the jeans blue, but the police officer's uniforms as well. The first official police officers appeared in the 19th century in London. They were given a blue uniform to contrast with the red and white uniform that military workers had already been wearing. Two decades afterward, the police force was adopted in the USA and they followed the patterns. The uniform is still blue nowadays because it proved to be a good color. It's not that visible in dark
hours and police officers can observe things and people staying unnoticed. Also, stains aren't that visible on dark material. And well, everyone knows that police officers wear blue and they're recognized it. So why change that? Baby carrots are tiny. And unlike regular carrots, wet, not unlike baby humans. Baby carrots aren't some special sort of carrot. They're actually made of regular carrots by cutting off the skin and outer layers and then polishing them to look that pretty. The problem is they can't retain moisture. A regular carrot retains some water inside because of the layers that lock it in. Once they're chopped out, baby carrots can dry out easily. So, they usually sell them in
bags with some water inside. Jeans have metal rivets and they're there from the very beginning. Jacob Davis, the man who made the first pair of jeans, added copper rivets to spots where pants are more likely to rip, flies and pockets, to make them stronger. Today, they have more of a decorative purpose since they are distinctive and traditional for jeans. Another special thing about jeans is those tiny pockets they have that seemingly serve no purpose. Well, maybe it's true now, but years ago when many cowboys were wearing jeans, the pocket was made specifically to keep a pocket watch there. Also, back then, a pair of jeans had just four pockets. that tiny pocket, the watch pocket, two big pockets in front, and just one pocket in the back.
Car headrests are all about comfort, and detachable headrests are all about safety. If you pull the headrest out, you'll see two sturdy metal bars. If you ever get locked or trapped in a car, you can use the bars to smash the window and get out. Those little red spots you sometimes see after you crack an egg are nothing to be worried about. Tiny blood spots can be caused by a small rupture in a blood vessel of a hen as it was laying the egg. Eggs with these blood spots are safe to eat, but that spot can be removed if you want. It won't affect the taste of the egg. Oh, that's comforting. Hidden within the Toblerone logo of the mountain is the image of a bear standing on its hind legs about to eat that
yodeller over there. No, not really. This is because bears are a big part of burn, one of the biggest cities in Switzerland where the founder created the triangular chocolate tree. Toblaron is also a play on the founder's family name tobler and the Italian word trone for honey and almond nougat. The space below a cup of noodles is there to protect the noodles during transport. This technique is called a middle suspension. Not only are they protected better in their styrofoam cup, but it also helps those noodles soften more evenly and quickly. Even though you might have noticed that the hole on the barrel of ballpoint pens has no purpose, it does. It's called a venting system, which helps the ink flow more smoothly.
This way, an even amount of air pressure is created inside and outside the pen, allowing the ink to flow into the point easily. It's not an accident that soy sauce bottles have two spouts. The sauce is liquid and it flows out of the bottle pretty quickly once you turn it over. Most Asian food lovers will admit they've spilled it at least once in a lifetime. That's why nowadays restaurants prefer serving soy sauce in special bottles that have two spouts.
This design allows you to control when and how much sauce will come out. Just put your finger on one spout while you pour the sauce through another. If you press your finger tightly to the spout, the sauce will stop flowing. And if you remove your finger, it will flow again. And please do not remove your finger in a restaurant. It will freak everybody out. You've probably noticed that train and bus seats are covered in fabrics with weird patterns. Any idea why they use these patterns to cover any germs and stains on the seat? Oh boy. The brighter the color and the more patterned it is,
the harder it will be for a passenger to notice any stains and get grossed out. Also, the patterns are usually so ugly that no one even wants to look at them for long enough to spot any stains. So, yeah, the pattern is there to make you look away and if you look to make it less noticeable. No bus will ever have plain white seats. That's a guarantee. The middle tab on soda cans can be flipped around. You can slip a straw in place so you don't have to hold it up to your mouth. This stay on tab replaced the pull ring tab created in the early60s. You remember those, don't you? Those could be quite sharp and easily discarded where they could be a menace for others. Now you can pop your straw
straight into one. Also means you can produce some bubbles and make a mess like a three-year-old. Sometimes when you purchase an article of clothing, you receive a plastic baggie with an extra button and a swatch of fabric. While the fabric is clearly used to patch holes, it can also be used to test the effects of various cleaners on certain surfaces. It's handy, too, to test wash cycles before using them to wash the whole garment. Escalators have those fluffy black brushes for a similar reason that some have yellow lines on their steps to try and deter people from getting too close to dangerous places. People don't always take notice and sometimes clothing can
drape close to the point where the step meets the edge or skirt. The brush is a little barrier to help prevent this from happening. They can also catch bits of fluff and prevent other small things from falling down into the gaps. Those takeaway containers most associated with Chinese restaurants are designed to not only carry your food home, but to store it in the fridge. They double as a plate as you can eat straight out of them and don't have to worry about dirty dishes. Yay. They were actually patented way back in 1894 to transport freshly shuck oysters and were known as oyster pales. They were later adapted to use as leak proof containers for food.
Ever wondered why coins have those little ridges along the edge? It's a leftover from earlier times when they were worth more. Counterfeits could easily file the edges off to sell as gold or silver coins to make some profit. The ridges were created so it was much easier to tell which of the coins had been altered. It's not needed today, but the coins still have that altered style. All crackers and some cookies have holes to make sure the final product has the right texture. These teeny tiny holes allow steam to escape so your crackers and cookies won't snap. If it weren't for these holes, also known as dockers,
steam would build up inside the treat and the final result might have been scrumptious, but it would have been rather oddly shaped. Dogs like to walk in circles before snoozing because they inherited this behavior pattern from their ancestors. There were no special doggy beds back then, so most pooches would have to push down tall grass to make a sort of snoozing spot. Plus, as a bonus, those movements scared off all the critters lurking in the vegetation. Donuts are ringing shaped for a similar reason. If they hadn't had holes right in the center, the dough there would have always been undercooked. By the
way, they're often associated with the police because back in the 1950s, doughnut shops were among the only places openly. They were a perfect place for police officers to grab something to eat and even deal with some paperwork during the night shift. Your jeans are blue on the outside and white on the inside because of a smart way to weave the fabric. The warp thread is dyed while the weft thread has no color. It's just white. This way, manufacturers reduce the amount of dye needed for each piece of clothing. And they're still dying to make the jeans.
