yes it is a brand name but its become a parachute term for any bong that isnt the common straight up variety.

Ive got one, Canadian made Red Eye Glass it was a $160 after converting it to glass on glass, from oversize. Well worth it, always impresses and has been around for some time.

Its easy to clean the kinks dont get dirty because the water doesnt get up there and when I pour the water out I always give it a rinse or 2, and the base I clean occasionally with rubbing alcohol and salt.