Simply drop an Eco Drain Cleaning Stick into the U-bend of your wash basin, sink, bath or shower and let it get to work. Using natural enzymes and bacteria, each Eco Stick breaks down soapy sludge, grease, hair and other organic matter, to keep your drain fl owing freely for up to a month. Result: there are no blockages and no sniffy smells either. What's more, because Eco Sticks are completely natural (containing no harsh chemicals or detergents) they're kinder to the environment and safe to use with all types of plumbing and septic tanks. Supplied in packs of 12 - enough for up to a whole year of free-flowing, sweet-smelling drains.