From Knitting with Balls:



Since the dawn of time, man has struggled against all odds to keep beer cold.  Once the heavenly brew is pulled from the cooler, a chain of events is set into motion that can only end in warm beer and hands dripping with condensation.  Slip this cozy on, however, and you’re good to go!  Made with a stretchy blend of cotton and Lycra, the beer cozy provides modest shade from the sun--and means no more coasters.