Re: All hookah bowl types
you have your main shapes of egyptian (with the mod bowl lumped under it), phunnels, and then the more traditional tombac bowls.
glass (pyrex/borosilica)-more for looks
ceramic- there is no such thing as a clay bowl, it is unglazed ceramic and yes it is a big difference, if you had a clay bowl (unfired) it would not last more than a session or 2. once clay is fired it becomes ceramic, you have the difference of what type of clay it was that will determine some about the bowl (like the phunnel bowls use a special clay).
metal- easy to make and looks cool but doesnt work well, metal dissipates heat to fast