Private Preserve wine preserver spray is a simple way to keep an opened bottle of wine fresh for longer and preserve its bouquet. Private Preserve replaces the air in a wine bottle with a balanced mixture of nonflammable and tasteless carbon dioxide, nitrogen and argon gas. Similar to how low temperatures keep food fresh in a refrigerator, spraying Private Preserve into a wine bottle reduces oxygen to keep wine fresh. Air flows into a wine bottle when you pop the cork. Simply reinserting the cork will prevent a continuous flow of oxygen from entering the bottle, and slow the oxidation process. But the oxygen already inside the bottle will be enough to age the wine. Private Preserve wine preservation spray differs from fresh air because it lacks oxygen and impurities. Private Preserve protects wine, sherry, brandy, port, cognac, sake, single malt scotch, plus flavored oil and vinegar for days and even weeks. One can contains enough gas to preserve up to 120 bottles of wine. Private Preserve contains no CFCs.