The goDog Retrieval gloBone adds a new twist to fetch by securely attaching rugged tennis balls to either end of a super-tough rubberized center. Ideal for play day or night, the rubber glows in the dark! The fun shape is easy to throw and bounces erratically for zany playtime. Patent pending Tough Core Technology adds a durable foam insert and bonded seams to create a more durable, safer tennis ball for longer lasting play. The gloBonefloats, making it a great choice for water play. This toy is intended for interactive play and is not meant for use as a chew toy.