The Bully Grip products as are truly effective and unique.  The classic Bully Grip is a multi-functional dog toy as well as a safety device made from all-natural rubber.  Bully Grips are tested for toxins by Qima Labs in the US and are toxin free! 
The classic BullyGrip works as both a treat holder, as well as interactive toy.  It bounces, wobbles, rolls, etc!