You can stuff the monster ball’s eye with treats that will keep your pup busy trying to get them out. The Monster Treat Release Toy™ is tough, durable and gentle on teeth. It is perfect to incorporate in water play as it also floats. The Monster Treat Release Toy’s eye glows in the dark. This toy is made of DURALITE material, and has a no-noise bounce. Keep your pup busy with this fun fetch and rewarding treat toy.