NCAA Duke Blue Devils Can Cooler Kolder Can Coolers These can holders are constructed from 3mm Neoprene Wetsuit rubber. They are designed to keep your favorite beverage COLD... and your hands WARM! The full gluedin bottom means your beverage wont drip on you. The neoprene construction means it is easy to remove the bottle from the holder no pliers needed. The Kolder Holder will fit in the console of your car, truck, golf cart or boat.