Bongs and water pipes are often used by smokers to cool and filter smoke before inhalation. A glass bong can come in a wide variety of designs, sizes, and percolators. The percolators are the biggest game-changer, they provide additional filtration and diffusion by breaking up the smoke into tiny bubbles and force more of the smoke's surface area to be cooled by water. All of the water pipes and glass bongs for sale are made from thick, high quality scientific glass, with various percolators to ensure excellent filtration. Many of these water pipes can be used with quartz nails and other accessories. Add an ash catcher for an extra level of smoothness!