Say goodbye to bad breath with Listerine Zero ALCOHOL Cool Mint Mouthwash. Listerine Zero alcohol-free mouthwash kills 99.9% of bad breath germs with a less intense taste for a fresher and cleaner mouth than brushing alone. It features flavors found in Listerine Antiseptic, but in a less intense formula. With approximately two weeks supply in this 500 mL bottle, get 24-hour protection from bad breath germs by rinsing with mouthwash for 30 seconds twice a day, both morning and night. The great-tasting Cool Mint flavor of this less intense, fresh breath mouthwash leaves your mouth feeling clean and refreshed.