Pump with four stoppers.
The Vacu Vin Concerto is a vacuum pump, which extracts the air from the opened bottle and re-seals it with a re-usable rubber stopper. Place the re-usable stopper in the bottle and extract the air from the bottle using the Wine Saver pump. A "click" sound tells you when you have reached the optimum vacuum level. The vacuum slows down the oxidation process so that you can enjoy your wine for longer.