I picked up the Insta-Chill Standard Can Sleeve, Set of 4 and they work as described. Freezing the sleeve for at least an hour then wrapping it around a room temperature can actually chills the drink in about 10 minutes, and cold cans stay cold for hours. The neoprene keeps my hands warm and the velcro holds tight on 12 oz. cans. They store flat in the freezer, which saves space. Hand wash only, so a little extra care. Great for beer, seltzer, or juice.