mso. I did consider a plaster lining, (as used in cobs). However, the silica content in the walls (also found in briar), seems to hold up, so long as a proper cake is formed, (I coat the surface with raw honey to promote it). I believe Bamboo has the same heat resistance as with briar and oak.
I also heat cure the bamboo with a propane torch. This chemically alters and hardens the material, while burning off toxins and driving water out. However, this piece was not heat cured, but dried over the course of a month as a test. Yielding it's natural gold tone when polished. When smoked, I do not smell any of the odors encountered as with heat treating.
Bamboo has a soft, waxy feel, much like a crisp apple. It just feels good in the hand. I do agree with the earth tones. I use Howard's Butcher Block Conditioner to polish and keep them from drying further.
My oldest pipe is two months old, has a nice cake and is beginning to form a dark brown patina, much like Meerschaum, I guess.
I think bamboo is overlooked due to marketing appeal. Briar seems well established and offers more design considerations.