Easy to Use: Place the vacuum stopper on top of an opened bottle and press the lever to seal the bottle airtight, push the button on top by gently press, pump the air out until you fell a strong air resistance, and turn the bottle to mark the number of the exact date you opened your bottle. Vacuum Stoppers Keeps Wine Fresh: Vacuum seal anti-leakage,Remove air from your opened wine bottle to keep wine tasting new for up to 7-10 days, Wine stopper includes a date marker to ensure the last glassof the bottle tastes as good as the first pour. Highly Durable: Stainless steel which is durable, it is dishwasher safe. The wine bottle stopper is small in size, easy to carry and to store. Safe Material: Inner ring made of Food-Grade Silicone material, safe and reliable.