I'm making a bong I got this bottle I really like which I'm going to use. I'm trying to get something that's 14 mm wide so I can put a downstem and then attach it to a bowl. A bottle or anything that's 14 mm wide HELP.
Maybe a small pill bottle? Idk, why not just cut a hole in the bottle and fit a rubber stopper. Rubber stopper isn't even necessary if you want low effort.
