Private Preserve is a Inert Gas Aerosol that is Completely Safe! It is the #1 Rate Wine Preserver World Wide! Private Preserve prevents Oxidation by using the same inert gases used in the production and bottling of wine. Protect the freshness and Flavor of: Wine,Port,Sherry,Cognac,Scotch,Bourbon,Tequilla,&Sake, as well as fine Cooking Oils & Vinegars For Days,Weeks,Months... Even Years!!