I still have my college bong but I lost my, "No Smoker Toker", It had a see-through red PVC tube about three inches around. The business end was metal and held a doobie and it sealed with O rings against the tube. At the other end was a one-way purge valve that let air in as you drew on it. The rest of the smoke staid in the tube. It was easy to pass around and the toke end was like an old style hash pipe. It was 7 inches long. They were great for windy days. It was kind of like the old Power hitter that I don't think you can buy any more either. It was just a straight red tube or blue I had seen. Does anyone know if they are still available?