PVC pipe is great for making pipes. Make whatever shape you like and cut up a soup can or something for the filter/bowl.

And, you all know that all aluminum used in food handling since the late 70's is required to be anonized, which removes the ill effects of raw aluminum exposure, don't you?
I found that out the hard way while trying to make thermite.
The coloring on the popcans is still like smoking paint, though.