- Colored toothpaste
Have you ever wondered why classic toothpaste has stripes of three colors: white, blue, and red? It turns out that each stripe has different ingredients and purposes.
- Fluoride (the white component) is the most important ingredient in toothpaste, containing the substances that whiten teeth and remove plaque.
- The blue (or green) Aqua Gel has antimicrobial and refreshing effects.
- The red gel was added later. It contains some crucial elements for healthy gums.
In reality, there's no need to divide toothpaste into different colors. It's just a clever marketing strategy.
2. The crown of the Statue of Liberty
Everyone has seen the Statue of Liberty in person or in photos. However, few people know that the seven spikes on the crown of this statue represent the seven oceans and the seven continents of the world, indicating the universal concept of freedom. And one more interesting fact: each spike weighs exactly 150 pounds (about 68 kg).
3. Ballpoint pen :
Many ballpoint pens have a small hole in the middle of the casing. Some thought it was a manufacturing error, while others believed it had no purpose. In fact, this hole was designed to allow air in and help the ink continue to flow. This air allows the ink to flow smoothly, and in moments when the pen stops working, all you needed to do was remove the ink cartridge from the casing and shake it a little!
4. The small bow on the back of most of your shirts is there for a few reasons. First, and probably the most obvious, is to hang your shirt on a hanger. In the past, men also cut this bow on the back of their shirts if they started dating a girl to signal that they were in a relationship.
5. If you've ever been on a plane and suddenly been startled to see a small hole in the window next to you, don't be afraid! The reason the holes exist is to help regulate the air pressure that passes through the inner and outer panes of the window.
6. The extra piece of fabric or material that comes with your garment isn't there as a backup in case you tear the material, as most people think. It's actually there so you can test the material with your detergent or washing machine to see if it will have any negative effect on the fabric.
7. If you can't figure out why there's a small hole between your iPhone's flash and the camera lens, don't worry, the answer is quite simple. It's actually a secondary microphone, which helps the phone filter out background noise. It also helps your phone's personal assistant, Siri, understand different accents.
8. Most lotions, shampoos, and makeup products you buy have a series of mysterious symbols. The highest symbol tells you the product's expiration date! So, if you see "12M" (as in the image below), it means you have 12 months from the time you opened the bottle to use it before it expires.
9. You know that funny little "button" at the bottom of your rearview mirror? It actually has a purpose. When you're driving at night, pressing the button backward can protect you from being blinded/dazzled by oncoming headlights without losing visibility. Who would have thought of that?
10. Hyundai:
Like many of us, when you see the logo of the South Korean multinational Hyundai, you think it's simply the first letter of the name. In fact, that's not the case; the letter "H" symbolizes two people (a customer and a company representative) shaking hands.