A bong (also water pipe, billy, bing, or moof) is a filtration device generally used for smoking cannabis, tobacco, or other herbal substances. In the bong shown in the photo, the gas flows from the lower port on the left to the upper port on the right.

August Gustav Heinrich von Bongard (12 September 1786, Bonn – 1839) was a German botanist, who worked at Saint Petersburg, Russia.