Unlike conventional stoppers or vacuum pumps, the revolutionary zzysh® Wine Preservation System keeps a bottle’s natural flavor and quality for weeks after opening. This unique Swiss technology replaces the air in the bottle with 100% food-grade argon gas to protect the wine from oxidation and loss of flavor. It works with all kinds of wines like red, rosé or white, and allows wine lovers to enjoy wine by the glass without having to finish the entire bottle. Tested and recommended by wine experts all over the world.