Grav Upright Bubbler

The Upright Bubbler is both a workhorse and an innovation of design. You can put any 14mm bowl, ash catcher, or oil conversion you want in the receiver, and then attach any 14mm mouthpiece you want to hit out of. The large multi-armed tree perc inside delivers a highly filtered hit. This is one of the most versatile stand-alone pieces that Grav Labs offers; it really does it all.