KEEP WINE FRESH: Different from the traditional wine saver pump with separated stoppers, this wine bottle stopper is one-piece design but its still equipped with built-in pressure pump which can also remove air from your wine bottle to keep wine tasting new for up to a week or more. 1pack stainless steel, 1pack aluminum. POWERFUL VACUUM EFFECT: Newest upgraded version! The air valve performance has been greatly improved so that now it has more powerful vacuum up to 0.05Mpa. The product size, meanwhile, becomes smaller by leaving out the topper. EASY TO USE: Just insert the stopper into the bottle and pump until you feel the strong resistance which signals an air tight seal. This wine corks allows you to store bottles horizontally on a wine rack or in a fridge. HEAVY DUTY:Made of brushed stainless steel and food grade pure silicone, can hold up well with regular use. Fits most wine bottle. WINE GIFT ACCESSORIES:These wine sealers are fantastic for wedding, party, Thanksgiving, Christmas and any other events or holidays to make a great gift or party favors -- especially when paired with a bottle of wine. What a gift idea!