Others Others Listerine Solution Cool Mint Mouthwash 500 ml Listerine Cool Mint mild flavor mouthwash 500 ml for deep cleaning and fresh breath. No alcohol. Using Listerine Cool Mint with a mild flavor 2 times a day fights the germs that cause dental plaque and gingivitis and offers a sensation of fresh breath that lasts. How to use: Use twice a day. Particularly effective when used in the morning and in the evening after brushing.