Clean in about a minute, with no scrubbing. Formula 420 Original Cleaner works on glass, Pyrex, metal and ceramic pieces, including the hard-to-reach insides. It pairs a cleaning liquid with crystals that scour as you shake. Pour some in, cover the openings, and shake the piece. Then rinse thoroughly with warm water. This bottle holds 12 oz. Keep it off plastic and silicone, which this formula isn't meant for. For water pipes, empty the old water first so the cleaner works at full strength.