Wine stopper & vacuum pump from Vacuvin is made of ABS, thermoplastic elastomer, and polyoxymethylene. This practical wine-saving pump extracts air from opened bottles and seals them with a reusable rubber stopper, slowing down the oxidation process and extending the wine's shelf life. Place the vacuum stopper in the bottle and pump until you hear a click. The product traces its origins to the first version from 1986 and comes in gift packaging with one stopper.