NONTOXIC MATERIAL: the product is made by extra-tough rubber, good elasticity, bite-resistant and nontoxic, non-abrasive, safe for your sweet dog grinding and cleaning their teeth. MORE ENTERTAINMENT: Perfect for fetch and interaction with your dog. You can add food or treats into the grooves and this can keep them busy for hours. STRONG TOOTH: Soft and unique surface relief, can effectively help clean their teeth and keep their gums healthy. IMPROVE INTELLIGENCE & IQ TRAINING: This dog toy can easyly attract your pet's attention, help pets' intelligence improving, and is convenient to train dogs. PERFER GIFT: Your naughty active dogs will be love it to kill the boring time.