I bring my beer bottle outside In the sweltering heat of summer and before I know it, I’m drinking warm, flat pee water. Most koozies are made for cans, but BottleKeeper is perfect for your beer bottles. At first glance I wondered how the heck do you get the bottle in! I’ll save you the embarrassment and tell you that the bottom unscrews so you can slip it right up in there. It’s well insulated so it will keep your drink cold for hours! And it comes in different sizes so you can always fit your favorite beer in it. BottleKeeper makes a perfect gift!