i cant tell if im the first one to say this but why not both? I say you cant tell the tastes apart if you got some good chronic, but if your smokin shag then glass all the way...actually just glass bong all the way. also i recomend metal for anyone who is a stoner on the go,the durability is insane and there isnt much else in the word that sucks quite as bad as dropping and breaking one of your favorite peices