Tug it, shake it, toss it. The Chuckit Tri-Bumper is a medium-sized rubber bumper toy that provides erratic bounce! The contoured center joint tapers to allow easy pickup for dogs of any size. Made from rubber, EVA foam and polyester construction. Tug it, shake it, toss it, rubber bumpers provide erratic bounce Contoured center joint tapers to allow easy pickup for dogs from any side. Amphibious.