Chill Puck is a re-freezable next-gen ice pack molded to fit 12-16 oz cans. Cooling from the bottom prevents that last warm sip we all hate. Clip directly on to the bottom of your can or insert into the bottom of your favorite koozie. The puck stays cold for up to 30 mins from frozen and can maintain up to a 10° difference in your beverage temperature. Don't be a fool, keep your cool!