Percolator bong

Percolator bongs come in a variety of shapes and sizes, but they all have one thing in common: they feature one or more percolators. Each percolator contains a series of small holes or slits that allow the smoke to pass through. As the smoke passes through the percolator, it is broken up into smaller bubbles. These bubbles help to cool and filter the smoke, making it smoother and easier to inhale.