I bought this new kind of glass pipe that uses white rice as a replaceable filtering agent. It's about 4" long, has an end cap at the bowl end for portability and there is a hole for a straw for a cooler smoke. It's called the RicePipe. Has anyone else seen one of these or had any experience with using rice as a filter? My camera and webcam are broken but I found this picture on their site to give you an idea what it looks like. The glass is clear, it smokes coolly, burns herb slowly and the rice absorbs a lot of tar.