A bong is a type of water pipe used for smoking substances like cannabis. It typically consists of a bowl for holding the material, a downstem that connects to a water chamber, and a mouthpiece for inhaling the smoke. The water in the bong cools and filters the smoke, making it smoother to inhale. Bongs come in various shapes and sizes, often made from materials like glass, plastic, or ceramic. Some bongs feature additional components, such as percolators or ice catchers, which further enhance the smoking experience by providing extra filtration and cooling.