Ellen and Listerine are teaming up to make smiles brighter everywhere! It takes 21 days to form a new habit, so add Listerine to your daily oral care routine. Take the Listerine 21-Day Challenge for a healthier mouth you can feel, or your money back! Get up to 5x healthier gums in 2 weeks and get up to 9x healthier gums in 4 weeks by adding Listerine. Find out how you can win $21,000 by taking the "Smell My Breath" challenge, here!