The JW® Hol-ee Roller® Wobbler dog toy combines the concept of the best-selling Hol-ee Roller with an auto-righting design to keep dogs engaged and entertained. The top half holds treats while the bottom half is weighted to create a challenging wobble; and to stay upright; even when swatted by powerful puppy paws. Made of durable rubber. One size suitable for a wide variety of dogs. Ships in three in assorted colors - blue; green; and red.PRODUCT NOTE: Every dog plays differently with their toys. No dog toy is truly indestructible. It's always a good idea to keep a close eye on your dog to keep your dog safe. ALWAYS remove the toy from being played with if pieces break off.