the Arb Champagne Stopper has Excellent Airtightness Which Preserves Freshness by Minimizing Champagne Oxidation. with the Rotary Button Design for Lock & Unlock, It Ensures That the Bottles Remains Sealed to Preserve the Contents. Whenever You Want to Pour Another Glass of Champagne, You Just Need to Rotate It Again. Great for Using at Home, at Hotels, Clubs, & Bars. This Champagne Stopper Preserves the Contents Just Like the Original Cork, Making This a Must-Have for Any Champagne Enthusiast. Minimum Quantities Apply.