Laboratory Rubber Stopper (S/F)

Laboratory rubber stoppers, also called rubber corks or bungs, are used in chemistry and winery as an industry-appropriate alternative to traditional stoppers made from cork. In chemistry, rubber stoppers are used to seal flasks and test tubes to contain substances used in the laboratory, while in winery, they are used to seal containers for fermentation. In winery they are more commonly called bungs, and the hole in the barrel into which the bung is inserted is called the bunghole.