Made up of pure isopropyl alcohol, IPA Clear or IPA Lite are both a great solution for grimy bongs and glass. First add salt, preferably coarse salt like NaCl by Nucleus, then pour in the alcohol. Plug up any openings and get to shaking. You will be able to see the residue rubbing off as you shake. Pour out and rinse your piece for a spotless water pipe. Each bottle of Pure Isopropyl Alcohol comes in 16 fl oz.