KEEP FRESH Just pump the vacuum wine stopper for several times until it sucks itself tightly. Minimize the oxidation of wine by sucking the air out of the bottle. This will help to preserve the wine's flavor and keep the wine tasting fresh up to 10 days. DATE MARKERS DESIGNThis vacuum wine stopper has numbers and dates on the top which can help you to record the time you opened last time. Just turn the dial to point the time you want. Remind you to finish the wine in its best taste time. Please note it's just a record and it will not count down automatically. WIDELY USEThis vacuum wine stopper fits most wine bottles except Champagne, sparkling bottles and screw top bottles. It preserves better than the original cork and prolongs the wine freshness. EASY TO USE AND NO LEAKAGEJust insert the vacuum wine stopper into the wine bottle and pump it for several times to seal the bottle tightly, 100% seal and NO leakage. It performed perfectly and easy to use. SAFE & HIGH QUALITYThis vacuum wine stopper is made of high quality and durable ABS & Food Grade Silicone. It's safe to human body, non- toxic, high-class wine accessory.