GRAV Beaker Water Pipe - BlackNeed a classic beaker? You can't go wrong with a GRAV piece. This minimalistic beaker from GRAV is just what you need if you need a bong that's simple to use and made with detail and durability in mind. It looks fantastic with its transparent borosilicate glass construction and black accents on the base and mouthpiece. The piece is perfectly sized at 12 inches tall and comes with a removable downstem and a matching 14. 5 mm male bowl.