JWpet Crackle Heads Small, miduem & large Ball Dogs love the crackle sound of water bottles. The NEW Crackle Heads toys from JW Pet have specially designed balls made from water bottle material in every toy. The patent pending Bottle Ball has no cap that can come loose and no sharp ridges that can harm soft mouth areas. All of the fun with none of the issues associated with water bottles! These toys includes rubber, plush and canvas toys in a wide variety of shapes and styles. The Crackle Head will crackle your dog up. A twist on the classic rubber ball. Durable rubber with a ball inside made of water bottle material.