ThriftyVac Vacuum Bottle Stopper 4-Pack The ThriftyVac Vacuum Bottle Stopper works with any bottle and keeps wine, sauces, and other liquids fresh for weeks. Uses premium materials, including the same food-grade grease used by NASA in spacecraft Comes with the ThriftyVac Vacuum Pump You release the vacuum by simply pulling up on the black Check Valve. Comes four (4) to a package