the carb is the hole on the side of the bowl you cover it with ur finger. with a carb u can fill the chamber with smoke then let go of it and the smoke flies into ur lungs.
lookin good,i gonna buy a spoon, pipe or bong soon ,i"l probly only buy a bong if they have a decent sized one other than that id buy a spoon.
All glass changes colors aslong as its clear in 1 section. All it is is resin build up. That was for the guy that said something about if it wasnt color changing.