Inspired by the popular JW® Hol-ee Roller, the Hol-ee® Bone puzzle and chew toy features a patented natural rubber design that stands up to tough play. The super stretchy non-toxic rubber is a great treat toy training aid for tugging, tossing, fetching, or chewing. Holds a variety of treats or plush toys. Entertaining and Enriching: This puzzle and chew toy help keep your dog entertained and provides essential mental stimulation; Natural rubber is gentle on a dog's gums as they chew and teeth. Ships in assorted colors.