Bottle Cap Discs
Have you ever checked under the soda bottle cap? There is normally a plastic disc there. It might not seem necessary for you, but it helps with carbonation. We are not sure about the way it works, but the disc traps carbon dioxide and helps keep the fizz in.
Rearview Mirror Tab
When you drive, you should be looking in the rearview mirror often. Did you know what the tab at the bottom is for? It helps you change the position of the mirror to prevent getting blinded by the headlights of the car behind you. It deflects light and allows you to see what is going on behind you.