The Sunpipe H2O internal water Tank filters and reduces the temperature of the smoke which gives you a cooler, smoother and better tasting hit. The water filters out ash and there is also some amount of tar filtration, which is why the water turns brown. 100% stainless steel heating chamber and slider. Spring loaded slider design make the chamber capacity changeable. Customer can use 0.1-0.5 gram as he wishes. Mini size and magnet connection of water tank and heating chamber design make the whole device very easy to clean, take them apart, put them in resin cleaning solution or 91+ alcohol around 30 minutes, we can get a fresh device.