Glass is not porous and would not be able to soak up any excess moisture which would travel through the stem and nasty tobacco juice into your mouth. Usually they are made of briar, meerschaum, and hardwoods. Glass would be a great insulator thus getting Very hot! Perhaps @Glassman could elaborate as well.Don't smoke pipes, at least not yet, and I was curious how come not glass bowls/pipes??
Sent from my iPhone using Tapatalk