Maybe a bubble pipe? I'm trying to think of a pipe that is most water resistant, maybe a Falcon with
a Meerschaum bowl? At least, if you dozed off and dropped the pipe, it would go out and not cause
a fire. I'm another shower guy. I should probably soak in hot water, for my joints, but I don't. But if
I were going to do this smoking in the bath, I'd smoke an MM cob with a stock plastic stem. I think
I'd do an English blend; an aro with flavoring might make me queasy. Put a big old crockery bowl in
reach, to stow the pipe as needed, along with tamper and matches (dry, and must stay dry) or maybe
a lighter for this purpose. Happy soaking. Send a report. Sore joints? I highly recommend
Omega 3's; the improvement really took me by surprise.
Oh, also, a small clay pipe might be water resistant. If it took a bath, it would dry out, I think.