Oom Paul Pipe
thingiverse
I'm working on an Oom Paul pipe in Maya, but I haven't delved into printing a functional version yet. I'm confident it's possible; I've seen a printed working skull pipe that isn't a bong, so feel free to give it a shot. I have other pipes waiting to be finished, like a Calabash, Danish, and bull dog. Check out the Oom Paul at https://pipedia.org/wiki/Oom_Paul/Hungarian.
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