Product Description: Colgate Optic White Whitening Mouthwash, made with Optic Brightners is a great complement to the Optic White Toothpaste to instantly give you a fabulous white. How to use: Use Colgate Optic White Mouthwash twice a day after brushing for a healthier, whiter teeth. Fill cap to the line (20ml). Rinse thoroughly for 30 seconds, gargle and expel. Do not swallow. Not recommended for children