- Made of high quality TRP material which is non-toxic, environmentally friendly and durable. 2. Cooling pet toys, for dogs to cool down in hot summer, long term refrigeration and freezing. 3. It can help dogs grind their teeth, clean their teeth, relieve stress, relieve boredom, and prevent dogs from biting furniture in the house. 4. It can be filled with food and will fall off while playing, which can increase the animals interest in playing. 5. Lightweight and portable, suitable for indoor and outdoor play. 6. Delivery quantity: one piece.