PetSafe Slimcat is an interactive cat toy that randomly releases kibbles as your cat roll and play with it. Easy to fill with fully adjustable openings for different kibble sizes. PetSafe Slimcat is perfect for controlling food intake, dispensing treats, fighting obesity, and helping to maintain optimum weight. Ball can hold up to ¾ cups of kibbles (depending on kibble size). Dishwasher safe. Diameter: 3.5". Shipping weight: 1/4 lb.