The Tucker Ball from Aussie Dog is a fun food dispensing ball. Made from non-toxic plastic it has a hard construction. This ensures that the ball doesnt crack, shatter or pop whilst your dog is trying to retrieve his kibble. It has an internal restricting device in the shape of a small ball. This automatically rolls towards the opening hole, restricting the amount of treats that fall out. When empty the little ball rolls around and makes a rattling noise, which entices your dog to continue playing.