BobALot Multi Chambered Interactive Dog Toy by Starmark can be filled with treats or food in the top or bottom chamber, and must be manipulated by the dog's nose or feet to extract the goodies inside. Both the top and bottom chambers feature adjustable openings to regulate the difficulty in which the dog removes the treats. The toy holds up to three cups of food in a variety of sizes, and is a great way to feed and exercise your dog. The BobALot is made from a durable polymer with an antislip coating on the bottom. One size is appropriate for dogs of all sizes. The small is ideal for dogs under 30 lbs and measures 7" tall and 15" around the largest point.