Bubblers have their own advantages and are slightly different from bongs. There are multiple types of bubblers.
The bubbler is a smoking device quite similar to a water pipe. They consist of three essential parts; the bowl, chamber and mouthpiece.
You load your herb into the bowl, light it up, and draw through the mouthpiece. As the herb burns, smoke is drawn into the chamber, where a small amount of water provides filtration and cools the smoke.
After leaving the water, the smoke makes its way through the remainder of the chamber and is inhaled through the mouthpiece. The smoke chills through the chamber which gives it a mild and great hit.