2 Pack of StarMark Large Bob-A-Lot Interactive Dog Toys. Allows your dog to eat and exercise at the same time. The large bottom chamber fits up to 3 cups of food - enough for a full meal. There are adjustable openings at the top and bottom to accommodate most types of dog food and allow you to regulate the difficulty level. The weighted anti-slip bottom makes the toy wobble erratically enticing your dog to play.