>>59299332In crack pipes, the rock just sits inside a glass bulb like a rattle, and it's heated up by putting the lighter flame under it.
Weed pipes(what it sounds like you're referring to) you pack weed in a traditional looking pipe, and you heat it up by letting the flame hit the weed directly.
Bongs uses water to help cool down the smoke. And judging by how filthy the water can get, it also filters some of the shit out. When you smoke weed from the pipe, you're practically sucking in the flame