Dr. Bronner's Peppermint Organic Pure Castile Liquid Soap is Dr. Bronner's most popular fragrance. The peppermint essential oil tingles the body and clears the mind. Because therapeutically peppermint oil is a mild stimulant it increases vitality and clarity. All oils and essential oils are certified organic to the National Organic Standards Program. Packaged in 100% post-consumer recycled plastic bottles.