Katie's Bumpers Bottle Tracker Blue. Stuff it with an empty water bottle for some loud crinkley fun or with different scents to help hone your dog's tracking skills. Pair it with the Katie's Bumpers Clip n' Toss Rope for even more fun in the water Specifications for Katie's Bumpers Bottle Tracker: Manufacturer: Katie's Bumpers Quantity: 1 Package Contents: Katie's Bumpers Bottle Tracker