Compare to vanish drop-ins (Vanish Drop-ins is a registered trademark of S.C Johnson & Son, Inc. This product is not manufactured or made under the authorization of S.C Johnson & Son, Inc). Cleans & deodorizes with every flush. Twin pack. Fights odors, dirt and stains around the clock! simple to use. Just a drop in the tank and it goes to work!. Cleans and deodorizes with powerful blue detergent. Leaves bowl sanitary. Safe for plumbing and septic tanks. Bowl is non-toxic to children and pets.