They do! But they are quite pricy these days. The underground glass blowers of yesterday now have a huge market and are pricing accordingly.
Fun fact: the first bong I ever bought, I named "Purple People Eater". It was a piece of art. Not like these plain-jane clear glass bongs they have these days. Does anyone even make nice glass bongs, anymore? All I can find are these fuckin beaker lookin bongs that are everywhere.