The crackle heads ball is natural rubber ball covered with hol-ee styled cutouts that expose the crackle heads technology inside. Our patent pending bottle ball is placed inside the natural rubber cage to provide the crackle sound and feel that dogs love. The tough outer rubber molds around the bottle ball providing a protective layer that will hold up to rugged play. The bottle ball has no cap or sharp rings that can harm soft mouth areas. Crunchy and safe fun that dogs love wrapped into a classic functional shape.