The CHUCKIT Hydro Freeze Toy is a large, durable pet toy that is perfect for any dog. The toy features an internal reservoir that freezes to slowly melt over time, which keeps the water in the toy fresh and cold. The toy also has a fill port that allows you to easily add more water to the toy. The exterior of the toy is made of hard plastic, which is resistant to chewing, making it safe for your dog to play with. The toy is also compatible with the Chuckit! Launcher, which makes it easy to set up and store.