Help prevent destructive boredom behaviors with Starmark Everlasting Toys. Made of a soft, yet tear resistant proprietary material, they hold up to even the toughest canine chewers. They can be frozen for a cool summertime treat, and are dishwasher safe for convenient and easy clean up. Provide hours of interactive chewing challenge. Features two levels of difficulty: insert Everlasting Treat in top level for normal play or push down to lower level for more challenging play. Use with one Everlasting Treats with dental ridges or original, Interlocking Treats, or small treats or kibble. Large for dogs over 40lbs. Comes packaged with one Everlasting Treat with dental ridges.