The Bottle Tracker Dog Training and Fetch Toy can be used for retrieving, scent recognition, search & rescue training, and contra-band training. Fill a basic plastic bottle, which acts as a barrier between the scent and the toys' inner surface, with training treats, ice, or scenting materials and add a few holes for the scent to escape. Made from tough, pre-consumer recycled fire hose material, this toy has a Velcro sealed compartment for enclosing the bottle and a sewn in loop for tugging. You can even stuff the Bottle Tracker Dog Training and Fetch Toy with other objects to make it heavier and easier to throw for your dog to chase down.