This toy is used to activate the dog while being rewarded. It makes sure it keeps your dog active. The innovative ball is extremely durable and double-shaped to get upset. Tough ball to stand out with chewing hard roof. When your dog interacts with the toy, the treatment tube and inner ball move from side to side. Very easy to use and fun. Unscrew the lid to place what you want the dog to receive as a reward. Make sure that the cover is screwed again. The toy is made of certified and patented non-toxic and durable rubbe