What type of device is often used for smoking cannabis while filtering it?

Bongs are devices specifically designed for smoking cannabis that incorporate a water filtration system. This filtration process works by passing the smoke through water before it is inhaled, which can cool the smoke and help filter out some harmful particles and toxins. The design typically includes a bowl for the cannabis, a downstem that submerges in the water, and an air chamber that allows the user to inhale the smoke after it has been filtered.

Pipes also serve the purpose of smoking cannabis but do not include the water filtration feature, which distinguishes them from bongs. One hitters provide a smaller, more concentrated hit without the intricate design or filtration of a bong. Roach clips are tools used to hold a joint or blunt in place for easier smoking but do not serve as devices for smoking on their own. This illustrates the unique function of bongs in the context of smoking cannabis with added filtration.