The tanks are made of PP with polypropylene faucets and screw caps and TPE gaskets and are autoclavable. It is mainly used for storing and dispensing solutions and culture media, and is also ideal for keeping sterile water. Can be autoclaved prior to use to prevent the growth of bacteria and other microorganisms. Pails are marked with 1 gallon or 5 liter graduations for easy identification of liquid levels during operation. The pail’s mouth threads are well-matched to the lid for a tight seal.