This treat-dispensing puzzle toy stimulates your dog's brain and supports healthy development. Toppl's soft, rounded inner 'teeth' feature a contoured cavity designed to hold treats in place until your dog nudges them out. For an added challenge, interlock sizes small and large or large and extra-large together. It pairs perfectly with nut butters, creamy treats, cheese chunks, mashed banana, dog biscuits, and more. Freeze wet treats for extended playtime. The toy is non-toxic, dishwasher safe, and made from zero-waste, recyclable Zogoflex material in Bozeman, Montana.