Guinness Beer Bottle Koozies Drinking Accessories - Ok - these Bottle Coozies from Guinness serve a great purpose. Keeping your Beer Cold. They are called a bunch of different things though. Some people call them beer koozies . Some call them Bottle Koozies. Then there's beer sleeve. Beer holders. Beverage coolie. foam koozie. koozie coolers. beer coolies. custom coozies. beer coozy. neoprene koozies. beer bottle cooler. No matter what you call it though, it does its job and keeps your beer cold. Beer Koozies from Guinnes - just get one.