A Soda Bottle Cap’s Plastic Liner
The clear plastic liners you find in soda bottle caps provide a very special function. They keep the carbon dioxide from escaping. Without the seal, all the gas would escape and your drink would wind up tasting flat and just plain awful before your first sip.
F and J Keys on Keyboards
There are lines on the F and J key on your keyboard that feel like bumps. They’re not Braille, but they are there to let typists know where their pointer fingers on their right and left hands should be. That way, they never have to divert their eyes from their computer screens to look at the keys.
