Also a proper calabash gourd pipe, with pressed meerschaum cap/bowl. Though these are difficult to find nowadays. I gots me one long ago.I'm surprised nobody has mentioned Cobbs, clays, or meerschaum, all having places among your briars.
For no more than $10 a humble cobb is a necessity for the glove and tackle boxes, or pocket, and there are some VAs that must be sampled in a cobb. Smoke them in the pool, lake, river, ocean, or tub without a care, and they do well back-to-back while traveling. They last, but you'll lose them in the water or maybe fish slime, and who cares?
A clay (with experience) is nice for a short experiment doing your own mixing or for occasional fun (woo-hoo lol).
Non-vintage meerschaum depending on the porosity gives you the opportunity to caramelize it yourself and is a great travel pipe since it does well with immediate back-to-back bowls. Vintage bowls can be gorgeous.
Also a hukkah (I made mine from lab equipment and a Falcon bowl).
Also a traditional cherry wood with bark still on--with cherry tree stem stem,
Also a peace pipe (calumet) with pipestone bowl (pipestone can only be quarried by verified native Americans).
Also a traditional porcelain (pretty to look at but awful to smoke imo).