Listerine Cool Mint, 250 ml, Mouthwashes and Mouth Sprays for Men, The Listerine Cool Mint mouthwash freshens your breath while also fighting plaque and helps keep your gums and teeth healthy. Characteristics: protection against plaque keeps gums healthy kills bacteria ensures fresh breath How to use: After cleaning the teeth, rinse the mouth with mouthwash for the time stated on the label then spit out.