A bong is a filtration device generally used for smoking cannabis, tobacco, or other herbal substances. In the bong shown in the photo, the smoke flows from the lower port on the left to the upper port on the right.

Tobacco is the common name of several plants in the genus Nicotiana of the family Solanaceae, and the general term for any product prepared from the cured leaves of these plants. More than 70 species of tobacco are known, but the chief commercial crop is N. tabacum. The more potent variant N. rustica is also used in some countries.