Has anyone come up with a good suggestion on what to use for the DMF O2 Reaction Vessel? I have searched around and everyone seams to have Ghetto rigged with no clear winner on what to use. I have been researching talking to Glassblowers even yet no one really seams to Know. Plastic it seams will wear out. SS is a no go but for a 4L reaction Vessel nobody seams to know proper thickness and stuff. Anyone have an answer?