Colgate Optic White Whitening Mouthwash in Fresh Mint flavor is a powerful mouthwash that actively whitens teeth and seals out new stains. With regular use, this mouthwash can help whiten teeth in just one day, making it a great addition to your daily oral care routine. The enamel-safe formula removes surface stains and helps prevent future stains from forming, while also killing bad breath germs for a fresh and clean feeling. The 500ml/16.9 fl oz bottle provides plenty of mouthwash to last for weeks of regular use.