The large GRAV Upright Bubbler is 9″ tall and made on 50mm tubing. Its fission downstem diffuses smoke through water and is fixed inside the bubbler to prevent damage. Its Dewar-sealed joint is flush with the body of the bubbler, maximizing the pipe’s internal volume. Its angled mouthpiece acts as a splashguard, and its lip wrap is tooled for comfort. The upright bubbler comes ready to use with a 14mm funnel bowl and works best with approximately 2″ of water.