Voted best by a number of wine writers and wine evaluators because you remove all air and replace it with safe and inert nitrogen, carbon dioxide, and argon which blankets the wine in the bottle.
To replace the air in the bottle with inert gas just insert the plastic straw into the bottle and give it a few short bursts from the can.
Reseal the bottle with a cork or original screw cap. Harmless, inert gas rests on top of the wine.
Keeps a partial bottle of wine as close to its original condition as possible. Wines will remain in good condition up to months. Does not flavor wine in any way. 100% safe. Number of uses with one can: up to 120 bottles. Recommended companion purchase: Get the best of Vacu Vin and Private Preserve with a purchase of Vacu Vin Vacuum Stoppers. They provide a perfect and re-useable seal.