The Vacuum Wine Saver is a pump that, along with its special stopper, ensures that wine in already opened bottles can be stored for a longer period. You insert the stopper into the bottle neck and use the pump to remove the remaining air. A "click" sound indicates that enough pumping has been done and the optimal vacuum has been achieved. The oxidation process is slowed down, allowing you to enjoy the wine again later. The unique, patented vacuum indicator signals with a "click" sound that the optimal vacuum has been reached.