After as little as two hours in the freezer (nontoxic gel changes color when frozen), the insert from FroBo's pet bowl of the same name keeps water chilled for hours. “This is a great idea,” our reviewer said. “I kept my dogs' old water bowl next to it and they would always drink out of the frozen bowl first.” Customers can purchase an extra Freezer Core, so they'll always have a chilled insert ready to go. The ABS plastic bowl holds 24 oz. of water and is an easy cool-down solution for dogs and cats, as well as a great way to keep them hydrated. It has a rubber base to prevent sliding.