Triple Crowns Everlasting Treat Ball is part of a unique interactive toy system. Made from an exclusively formulated material that is both durable and puncture resistant they hold up to even the toughest chewers - and are dishwasher safe! Constructed with a hollow middle that can be filled with treats, dog food or Triple Crown Flavor Treats as well as the unique side panels to perfectly fit Triple Crown Everlasting Treats to increase the challenge for your dog. These toys help to keep your dog mentally stimulated and engaged in an activity - eliminating boredom and common behavioral problems.