According to Gastrolab Although many types of plastics are used and discarded in the kitchen, this time we'll focus only on soda bottle caps. These are also known in some countries as bottle tops ...

Quite simply they’re used 2-liter soda bottles. They’ve been filled with water along with two caps worth of bleach to keep microorganisms out. The cap is then covered with a film canister to ...

Today, bottles of Coca-Cola that are kosher for Passover have yellow caps instead of the traditional red ones. In addition to the yellow cap, the bottle has a Passover certification symbol.