Freeze Pipe pieces use a sealed glycerin coil that you keep in the freezer. Smoke travels through the frozen coil and comes out dramatically cooler, so hits are smoother and easier on your throat.

Popular picks include the flagship Bong Pro, the best-selling Bubbler Pro, the Recycler Bong Pro and the compact Mini Bong. New to glycerin? Read What Is a Glycerin Coil Bong?