Once the supplied cap is inserted into the bottle, simply insert the pump and push the lever up and down rhythmically for about 10-15 seconds (depending on the amount of wine left over). When no more resistance will be perceived, it means that the air has completely escaped and the vacuum will have been created. At this point, you can remove the pump and, when you want to drink the wine, just remove the cap by simply moving the white valve. Swissmar's wine-saving set will ensure that your wine is kept in perfect condition for at least 20 days. The package includes a black pump and 2 black sealed and reusable stoppers.