A double bubbler is akin to two bubblers in one! By doubling up the filtration power, the smoother your smoke will be. The Pretty in Pink Bubbler is crafted with thick and durable glass. The body of the pipe consists of clear and transparent-pink glass, and on each of the stem percolators, a tight spiral design in green adds some extra color and visual interest. The bowl itself is nicely deep, providing ample room for ground herb for a great sesh.