The BIONIC Urban Stick 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 interested in it for months! Its unique interior shape provides strength for even the most aggressive chewers. Plus, the contoured ridges create a throwing grip and the opening is the perfect place to put treats and peanut butter. It’s even dishwasher safe for easy cleanup! The BIONIC Rubber material ensures that your dog will enjoy playing with the BIONIC Urban Stick for a long time.