Mrs. Meyer's Probiotic Drain Maintenance contains micro-helpers that actively work to prevent buildups, and freshen up any drain with the refreshing, mild citrus scent of Lemon VerbenaThis Probiotic cleaning product contains micro-helpers that self activate to provide an active clean, and work hard to keep your drains and pipes in tip-top shapePrevents build ups with regular useThis USDA Certified Biobased Product (88%) has plant-derived cleaning power and is made with essential oils and other thoughtfully chosen ingredientsUse Mrs. Meyer's Probiotic Drain Maintenance with septic systems, drains, pipes and kitchen sink garbage disposals - simply pour and let the micro-helpers do the hard work so you don't have to