Get a socket, get a knife and cut a hole in the cap. Fit the socket in there and tape the uneven cuts in the cap with duct tape. Make sure you pack the bowl with bud that at least is an actual bud and not broken up so nothing falls through the hole. That's what I do and wow, they are my #1 fav choice of smoking. Sometimes it bothers me so I don't smoke it too much. Inhaling too much dry smoke at one time. It tears me up, especially holding it for too long lol.