Listerine Cool Mint Antiseptic Mouthwash 500MLCOOL MINT is not only a germ killer but also a people pleaser. Its bold tingle has been America's favorite for years. Just 30 seconds of rinsing, twice a day. That s all it takes when you use Listerine Cool Mint Antiseptic Mouthwash. You ll get 24 hour protection with: Clinically proven health benefits The power to kill germs that lead to bad breath, plaque and gum disease 21% greater gingivitis reduction than merely brushing and flossing alone