BUBBLY TO THE LAST DROP: This is the first and only champagne bottle stopper with a pump on the market. Its built-in upgraded pump piston system can increase pressure in the bottle more efficiently than basic types, ensuring your sparkling wine stays fresh and fizzy till the last drop. PRESERVATION: Simply insert the champagne saver into the bottle, fold down the hinge-mounted flaps to lock onto the lower lip of the bottle, then press the button until you feel the strong resistance, signaling an airtight seal.DESIGNED FOR BUBBLY: Easily seals standard glass bottles of champagne, Prosecco, Cava, and other sparkling wines. You can also rotate the button to record the date you opened the bottle. Not for red and white wine.QUALITY SEALER STOPPER: HYZ Champagne Stopper is crafted from stainless steel and ABS, so you can rely on it for long-lasting performance, providing you leak-proof and airtight sealing! Dishwasher .IDEAL GIFT: Comes in a set of 2 in a box. Perfect to make a gift, goodie bag filler, and stocking stuffer