The KONG Biscuit Ball is a patented rubber ball with a hollow center and four bone-shaped ports to hold KONG Stuff'N Snacks and Easy Treat paste. This durable toy has all the fun of a ball, plus it keeps dogs busy removing the tasty morsels inside. Great for games of fetch and for stuffing. Perfect for use with our KONG Stuff'N Snacks and Easy Treat paste. Made in USA from Globally Sourced Materials.