Strong and durable rubber: designed for tough chewers to really get their teeth into Hollow centre: fill up with tasty treats or their favourite foods - keeps your pup busy and slows down feeding Fits their favourite treats: two holes in the top, excellently sized to fit tasty good boy chew sticks - the uk's #1 dog treat Dishwasher and freezer safe: easy to keep clean in the dishwasher - and for even longer-lasting fun, try freezing your treat ball