JW® Tumble Teez™ is designed to sporadically dispense treats as your dog plays with the toy. Intelligently designed, the Tumble Teez has a patented internal shelf design that works like a maze for the treat to travel through as your dog nudges and paws at the toy. This challenging puzzle dog toy is designed to keep your dog engaged and makes treat time last longer. Made of natural, non-toxic rubber and constructed with a super thick rubber wall, the Tumble Teez will stand up to all the fun your dog unleashes. The Small is suitable for dogs up to 15 pounds, the Medium is suitable for dogs between 15-40 pounds, and the Large is suitable for dogs over 40 pounds.