Glass dry/ash catcher with carb hole and plug from QaromaShop to slow the pull slightly, stop any rogue material from entering into your main piece and provide a shottie, eliminating the need to lift the housing/coil from the bowl to clear the hit.  These pieces are light weight with a flat base, easily standing upright on a flat surface.  Theyre small enough to put onto most waterpipes without tipping and big enough to catch a sesh worth of plant material/ash without the need to clean in between.  The design does not water filter the vapour/smoke at all; the piece only serves to stop the plant material/ash from entering your main piece and add a carb/shottie to your set up.