The Koozie Is Scientifically Proven To Keep Your Beer Colder That's right, someone did the research. When warm air hits a cold beer, the air reaches its dew point and condenses.

Whether you believe beer tastes better from a can or a bottle, there's one thing we can all agree on: beer tastes best cold. Enter the koozie. These oh-so-handy foam or fabric sleeves that keep ...