JW Pet, Large, Hol-Ee Roller Dog Toy, Non-Toxic, Fun, Versatile & Durable, Natural Rubber Gives It Strength, Bounce & A Soft Texture, Unique Open Design Allows You To Stash Small Treats Or Kibble Inside For Hours Of Entertainment For Your Dog, A Fantastic Treat Ball & Wonderful Training Aid, Great For Fetch, Toss & Tug, Chewing & Teething.