A bowl and wind cover all in one. This revolutionary designs makes it easier to smoke your hookah. Just put the coal on top of the provided screen (this piece replaces foil), then screw the wind cover closed. This allows you to not only get a great smoke, but also a clean and safe one. You can pick up the bowl and turn it upside down to shake out any excess ashes and it also saves the coal from accidently falling off the bowl and hitting the floor. No grommet required for silicone bowl.