Bottle Cap Definition

Bottle caps are used to seal bottles. Depending on their function, bottle caps come in different shapes and have different opening methods. For example, mineral water bottle caps are round and screwed on; aluminum can caps are ring-shaped and pulled on; meat can caps have no fixed shape and are torn open as they are; syringe bottle caps are made of one piece of glass and require grinding with a grinding wheel before being popped open; and beer bottle caps, a favorite among men, are pried open. Bottle cap designs are incredibly diverse, with designers racking their brains to make them more innovative and appealing.