Bottle cap
From Simple English Wikipedia, the free encyclopedia
Bottle caps are used to seal the opening of bottles. For glass bottles, these are usually small, specially adapted pieces of metal. With plastic bottles, plastic caps are used instead.
The original bottle cap was called Crown cork. It is pressed onto the bottle, and can be removed, using a bottle opener.
In recent years, also bottle caps with a screw mount were used. That way, a bottle opener is no longer required.