Enjoy a cold beer no matter where you go with the BottleKeeper X Premium Beer Bottle Insulator. An upgrade from its predecessor, this beer accessory keeps your beer colder for longer. Thanks to its vacuum insulated and double walled design, the BottleKeeper X helps your beer stay cold for up to six hours. Similarly, the cap seals the inner beer bottle to maintain freshness. The beer bottle insulator fits any standard shaped beer bottle, including Bud, Corona, and Stone. In addition, it provides a built-in bottle opener so you can easily open your bottle on the go. Made from 304 stainless steel and padded for impact, it is tough and long-lasting. Just put your beer bottle inside for a nice cold one while at the beach, camping, fishing and more.