Colgate Optic White Mouthwash has a clinically proven unique formula with optic brightener that activates as you swish to reflect light, leaving your teeth looking whiter instantly. Use it twice a day for the most confident smile: - Whiter teeth after the first rinse - Provides daily stain defence - Has a great refreshing taste This Alcohol free whitening mouthwash formula has been clinically tested by Dentists. It has a temporary optical effect of instant teeth whitening and long lasting protection with continuous use for a whiter smile between brushing. For best results, use Colgate Optic White mouthwash with Colgate Optic White toothpaste and toothbrush. Size: 500mL Directions: 1. Fill to cap 2. Rinse for 30 seconds 3. Day and Night use after brushing