Stopper (plug)

From Wikipedia, the free encyclopedia

A stopper is a truncated conical piece of rubber, cork, glass, or plastic used to close off a glass tube, piece of laboratory glassware, a wine bottle or barrel and other containers with orifices.

A rubber stopper is sometimes called a rubber bung, and a cork stopper is called cork.

Ground glass stoppers are commonly used with laboratory glassware, mainly because of their nonreactivity.