The small GRAV® Upright Bubbler is small, but mighty. At 6" the bubbler is made on 32mm tubing. Smoke is diffused through water and the fission downstem. GRAV Labs included angled mouthpiece to avoid splashes and the lip wrap soft on the mouth. For best results use with 1.5" water. Colors vary, and orders can include black, white , blue, green, red, purple yellow and orange.