7 THINGS YOU DIDN’T KNOW ABOUT YOUR EVERYDAY ITEMS
THE LITTLE HOLE ON THE SIDE OF A PEN
No, it’s not just a design, it serves an important purpose. Without that hole, your pen wouldn’t be completely airtight and as you write, the pressure would fall, preventing the ink from flowing to the tip and eventually, the pen would cease to write although there is still ink in it.
If you’re ever on a highland area, due to the fact that the pressure is lower there, a pen without the hole could explode, and stain your clothing. So the hole serves the purpose of balancing the pressure in your pen to allow it function well.
THE HOLE ON THE CAP OF YOUR PEN
Apart from making sure your pen writes smoothly, and ink doesn’t overflow from the other end due to too much pressure when you cover it with the cap, this hole also serves a precautionary purpose. It is believed that if one accidentally swallowed the cap, the hole would allow for easy breathing, pending when a surgery is performed to remove it.
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