PRESERVE and POUR Simultaneously.... Inert Nitrous gas charger fills your wine bottle as it simultaneously pushes wine up and out through the stainless tube and into your glass... keeping your wine oxygen free. Once the ViveVino stopper is in the bottle, wine is no longer in contact with the air that oxidizes it giving it a sour taste. The ViveVino is an excellent solution for small, high quality wines by the glass programs in restaurants or for home use. With no plastic tubes, it is safe from contamination hazards adn easily cleaned. Gas chargers preserve 2-3 bottles, parts are machine tooled and come in a handsome black gift box with 3 chargers. Preserves wine a minimum of 10 days.