The prototype for a glass lillie pipe came in the mail today. I contacted a scientific glass ware company to make the pipe for me. I will be placing a large quantity order to sell the glass return and supply in our auction area. The nipple for the suction cups needs to be reduced and the outlet lip would look better if it was more of an oval. If you are interested in making them DIY maybe contact local glass art stores, etc. I will post drawings that I made for the pipes later. I'm working on the return pipe and will get a prototype of that one next.