Our designers took years perfecting the Urban Stick! Careful attention was made to ensure it fits naturally in the curvature of the canine mouth. The ridges across the top give your dog the feeling that they are chewing through the toy, keeping them engaged. Its unique interior shape provides strength for even the most aggressive chewers. The opening on our Urban Stick is designed to be the perfect place to put treats and peanut butter. When your dog is done, simply throw the toy in the dishwasher for easy cleaning! Our proprietary "Bionic Rubber" material ensures that your dog will enjoy playing with the Bionic Stick for a long time.