Rocket Pop Cooling Dog Toy. Playtime in the summer just got cooler! Fill this rubber rocket pop with water and freeze – the water will defrost through the holes for the ultimate cooling and chewing experience! Another plus? Each layer has a different smell – cherry, lime and blue raspberry! It’s easy to clean, too – just wipe with a damp cloth and it’s good as new! Pets should be supervised when playing with toys as no toy is completely indestructible.