Keep your beer cold and safe with the BottleKeeper Stainless Steel Beer Bottle Insulator. Featuring a 304 stainless steel exterior, this beer bottle insulator fits a standard 12-ounce bottle of beer. BottleKeeper uses neoprene insulation to ensure your beer stays cold no matter how hot it is outside. It features a tall cap that adjusts to fits most bottles and even seals your open beer. Even though the cap may not screw down all the way for many bottles, it still seals it effectively. Similarly, the cap comes with a built-in bottle opener as well as a tether that keeps the cap attached. Furthermore, BottleKeeper utilizes powder coating for durability and is also padded to stop it from breaking with serious impact. To use BottleKeeper, just unscrew the bottom of the holder and place your beer inside. Finally, lock it in place and simply screw the cap on.