If you’re a coffee drinker who’s concerned about the potential staining effects of coffee on your teeth, you may invest in adding a specifically designed whitening mouthwash to your oral care routine. Some of the best mouthwash for whitening teeth include Colgate Optic White Whitening Mouthwash, ACT Anticavity + Whitening Mouthwash, and Crest 3D White Luxe Glamorous White Mouthwash.