PRESERVE WINE FOR UP TO 10 DAYS : The wine preserver removes air from your wine bottle to keep flavor of wine for up to 10 Days EASY TO USE: 1, insert the wine stopper into the bottle. 2, lift handle up and down to extract air. 3, pumping The air out until you fell strong air resistance, then it is OK. VALUABLES: Wine Saver vacuum pump is produced from ABS plastic which comes with 4 reusable bottle stoppers.