The Roller utilizes Twist and Lock Treats for a chewing challenge. Insert the treat onto the toy and twist it 90 degrees to lock it in place. The center of the toy can also be stuffed or frozen with treats or kibble for even more challenging play. Comes packaged with one Twist and Lock Treat. Made from our dog tough proprietary material thats non-toxic and free of latex, vinyl, and phthalates. Floats in water and fun for fetch. Dishwasher safe for easy cleaning. Toys and treat areThe Roller utilizes Twist and Lock Treats for a chewing challengeInsert the treat onto the toy and twist it 90 degrees to lock it in placeThe center of the toy can also be stuffed or frozen with treats or kibble for even more challenging playComes packaged with one Twist and Lock TreatMade from our dog tough proprietary material thats non-toxic and free of latex, vinyl, and phthalatesFloats in water and fun for fetchDishwasher safe for easy cleaningMade in the USA