Achieve a fresh smelling drain and avoid the odor with Lavender scent SANI STICKS® the concentrated cleaning and sanitation sticks you drop in the drain once a month to prevent backups, clogs and nasty odors before they start. The stick rests in the pipe-trap and slowly releases a blend of enzymes to break down food, grease, and other organic materials. SANI STICKS is safe for use on all drains and is safe for septic tanks. With 24 sticks, you can protect up to 2 drains in your home. It keeps your water flowing and pipes odor-free.