Ideally for stuffing full of goodies - this thing wil take baked treats, beef pizzles, wags, tendons, tripe, jerky, sticks what every you can get in there that have a way of getting out too. Designed to extend the life of expensive dog treats and keep the dogs busy for longer. The side openings release scent and taste while the continuous interior hole allows treats to extend out. Flexible ridges grip multiple sizes of treats. One of West Paw's toughest dog toys. Zogoflex Qwizl has a fascinating and unpredictable wiggly bounce when tossed and is fun fetch and chew even after the treats are gone. Curved shape makes toy easy for dogs to hold in place with paws Like all Zogoflex and Zogoflex toys, Qwizl is made in the USA, recyclable, floatable, BPA and phthalate-free, Latex free, FDA compliant, non-toxic and dishwasher safe. And guaranteed against dog damage ;o) Remember to choose appropriate toys for your dog depending on its behavior and history. Happy dog = happy owner!