The Jolly Pets Teaser Ball is an all-in-one ball that features a movable interior ball inside a rounded outer cube. It is designed for large dogs and extra large dogs that are 90+ lbs. The ball floats in the water for retrieving and fetching. The exterior of the ball is easy for dogs to grip, lift and carry. The Jolly Pets Teaser Ball is ideal for fetching, chasing and playing tug-of-war all afternoon.