Use the Portable Automatic Vacuum Wine Preserver and Bottle Stopper from Brentwood® to enhance your wine tasting experience. Oxygen causes wine to oxidize and spoil, leading to a loss of flavor and aroma. This vacuum stopper automatically removes oxygen from wine bottles, protecting the delicate aromas and flavor profiles you love. Effortlessly preserve wine in seconds by placing the automatic vacuum stopper over a wine bottle and pressing down until the green light illuminates. It is now ready for storage or travel. Simply remove the stopper to continue enjoying your favorite wine. Keep dust and debris away from your stopper while not in use, by using the included dust cover. It uses 2 commonly found AAA batteries. The sleek black color adds a sophisticated touch to your wine kit. Thanks to the lightweight, portable design you can enjoy fresh wine at home or while traveling. It fits most wine bottles and is not intended for screw tops, sparkling wine, or champagne bottles..