I made this out of a V8 bottle. Put 2 holes in the cap. Taped a mechanical pencil to my busted bubblers slide and slid it into on hole. Then I shaped 2 more mechanical pencils using a lighter so I can get a nice "suck hole". Air tight and hits awesome. I can make a new one easy as hell whenever this one gets bad. The carb is the cap. Turn it a little bit and there is enough of an opening for a nice endo hit.