About this project 7 Days Preservation TimeIf you are tired of the fast spoilage of opened wine, this wine preservation kit is for you. A vacuum pump can extract air from the bottle, delaying the oxidation of the wine. Reusable, high-sealing vacuum wine stoppers maintain a vacuum environment, providing 7-day shelf life for opened wine. The stoppers fit on a 1.85cm inner diameter finish, which means they can be used on most standard wine bottles. CompactSmall silicone wine corks only increase the bottle height by 0.6 inches and will not hinder the storage of wine in the refrigerator. At the same time, the high-density vacuum wine stopper also supports the horizontal storage of wine bottles without leakage. The small shape of the wine cabinet is convenient to carry when going out on a picnic, and will not be troubled by unfinished wine. Date MarkerEach wine cork contains a date disc to mark the date of opening the bottle. When you have multiple open bottles of wine, you don't have to bother remembering when each bottle was opened. Upgrade your home bar with our practical wine stopper! GREAT GIFT FOR WINE LOVERSEach of our wine vacuum corks are made of food grade silicone, safe, reusable and textured. This wine vacuum pump and cork set is a great gift for weddings, Christmas, anniversaries and birthdays. With these reusable wine stoppers, your friends can taste and preserve up to 4 bottles of wine at a time. When to stop pumpingAs shown in the video, when you quickly pull the handle of the pump and release it, if it can automatically return to the original position, you know the vacuum is enough, if not, please continue pumping .