KollerCraft's Chilly Bowl is designed to keep a pet's water cold during hot weather. The sealed gel pack is safe and easy to use—pet owners just place it in the freezer for an hour, and then insert it into their dog or cat's Chilly Bowl, the company reports. The bowl is designed with heavy-duty construction for indoor or outdoor use, the company adds. Available in 12-oz. and 32-oz. sizes.