Sani Stick the concentrated cleaning and sanitation sticks you drop in the drain once a month to prevent backups, clogs and nasty odors before they start. Keep Your Drain Pipes Clear and Odor-free All Year Long! Now in a New Lemon Fresh Scent! Perfect for the kitchen, vanity, bathtub and utility/mop sinks. Safe for septic tanks. Includes enough Sani Sticks to treat 2 drains for one year. Stop embarrassing sink odors before they start Slowly releases a blend of enzymes to break down food, grease and other organic materials Prevents clogging or smelly drains Perfect for kitchen, vanity, bathtub and utility/mop sinks Just drop one stick in the drain Safe for septic tanks Keeps water flowing and pipes odor-free Safe for use on all drains