This eco-friendly puzzle and treat toy was brilliantly designed to keep dogs busy. 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 Paws toughest dog toys, Qwizl is also fun to toss, fetch, and chew even after the treats are gone. Curved shape makes toy easy for dogs to hold in place with paws.