This is a serious bong in a relatively small package from the guys at Blaze Glass. They really couldn't have packed in any more features if they had tried. First off your smoke travels down a diffused downstem into the lower chamber. Then the smoke is bubbled up through a UFO percolator and lastly in the filtration cycle it rises up into a multi-slitted splash guard which catches the last droplets of water. Once fully cleaned the smoke's final journey is through a restrictor ring near the mouthpiece which causes the air flow to momentarily speed up and cause it to cool even more. The downstem has a 14.4mm female ground glass joint and they include a 14.4mm male ground glass jointed bowl to match.