This is a bowl that a designed back when TinkerCAD worked. Print it at 50% of its original dimensions. It is made so that the flame spreads over the whole bowl at once and minimizes waste. Use it if you're rich i guess. I successfully printed it on the Solidoodle 2 with no support material. Slic3r raises the bottom chamber a bit for some reason, which changes the aesthetics a bit, but not the functionality. I printed in PLA and would not recommend doing otherwise. I would actually advise against it.Print it, pack it, smoke it.