The Biscuit Ball Treat Holder has a hollow center and 4 bone-shaped ports hold biscuits, food or treats. Insert biscuits into the Biscuit Ball and watch your dog attack and chase the ball to get at the treats. It will keep your dog entertained and out of trouble for hours Treat dispensing fun! Made of nearly indestructible and chewer friendly KONG rubber. Diameter 6.5cm.