Perfect for keeping those meal worms in the cage 24/7. No more worms getting away. Plus this cups is disposable and recycleable. Nice flat bottoms as well. Also it works great as a water bowl for drawer systems. Lid keep water in cup when opening and closing the drawer. 3½" round cup ¾" tall with a lid opening of 2 ½". This is the perfect size for feeding worms to your reptiles.