The oxidation process starts immediately the bottle is opened, which is initially a desired effect, particularly for red wine. Wine should breathe so that its bouquet and aromas can be released. But if it is in contact with air for too long, wine begins to lose its freshness and flavour. The innovative seal of the FRESH & SAVE Vacuum Wine Sealer reliably slows down this process. Place the seal on the neck of the bottle and the powerful, handy vacuum pump, sold separately, extracts the air from the wine bottle at the press of a button.