does it exist?
I was playing around with some pyrex glass cigar tubes and was able to melt and make a nice round niche in it. Then I went and put a nice size hole then glued in a disposable mouth piece.
Now I can just push it into the hookah hose and use it to see the smoke and blow rings.
Anyone make an all glass thing like this? It'd be a cool personalized hookah mouth piece that has a chamber and lets you see the smoke.