Holds a Variety of Treats and Kibble - Use our original Everlasting TREATS® or Everlasting Treats with Dental Ridges in each end. Increase the challenge by adding smaller treats inside. Made with Virtually Indestructible Material - Stronger than rubber! Great for powerful chewers. Free of latex, vinyl and phthalates. Provides Hours of Challenging Play - Treat ball system encourages play which helps reduce anxiety and boredom behaviors.