There are plastic 30 gallon and 55 gallon drums, 5 gallon jugs, that chemicals are sold in, also tanks of many sizes, I would look to reuse some container that may be on its way to the city dump, maybe even some old fiberglass tank (well pressure tank, water treatment tank), and use chemical resistant flexible tubing, I do not know the types of tubing I use but it holds up very well to the distilling nitric and the high temperature of this and other gases. And of course you will need to make sure the materials of choice hot up well to the abuse of gasses, liquids, mechanical, temperature, pressure, vacuum, and other abuse you expose it to.
