Entertain & Challenge while feeding. Features:A new way to feed or treat. Made of food grade polymer weighted with play grade sand. Twist top opening and release. Dishwasher Safe. Benefits: Stimulating & rewarding. Safe and robust design. Easy to fill. Easy to clean. Elimination of gulping and the risk of bloat or gastric distress. NOTE - No dog toy is indestructible. Please supervise your dog's use of this toy. Size: 15 x 11cm. Fits half a cup of food.