Don’t let unfinished bottles of wine go bad on you again! Stopper opened bottles and create a vacuum seal that slows the oxidation process and extends the life of your wine. The Wine Saver is a vacuum pump that extracts the air from an opened wine bottle and re-seals it using a rubber stopper. The airtight vacuum inhibits the oxidation process that is responsible for the deterioration of wine. The vacuum is created by placing a stopper into the neck of the opened bottle and pumping it until resistance is detectable via its 'click' mechanism that indicates when a sufficient airtight environment has been established. The Vacu Vin Wine Saver is suitable for all but sparkling wines. It is highly durable and easy to clean via wiping with warm water and conventional detergents. The Vacuum Stoppers are dishwasher safe. The set includes one white vacuum sealer pump and 4 gray stoppers. This is a great gift for wine drinkers or for anyone who likes a casual glass here and there and doesn’t like to see their wine spoil. This is also a perfect item to bundle with other barware from my closet for a 15% discount and combined shipping!