every Roor bongs approach with normal sized ground glass joints that allow for simple improvement by adding together a diffuser downstem or an ashcatcher. A Diffuser forces the smoke to sift through the water in lesser foam than a typical downstem. Smaller bubbles add to the outside area of the smoke as it passes through the water causing it to riddle superior than bigger foam would. An Ashcatcher is a little add-on filtration hall that helps to additional filter the smoke and keeps several solids from life form pulled through into the water. This makes onslaught and maintaining a Roor bong little easier.