What is a bottle top?

A bottle top, also known as a bottle cap, is a closure designed to seal the opening of a bottle, preventing the contents from spilling or becoming contaminated. They can be made from various materials, including plastic, metal, or cork, and often feature a threaded or snap-on design for secure sealing. Bottle tops are commonly used for beverage containers, such as soda, water, and beer, as well as for jars and other types of bottles.