Crest 3D White Whitestrips Glamorous White Dental Whitening Kit: Whitens 25X better than a leading teeth whitening toothpaste (when toothpaste is used for 4 weeks) Advanced Seal Technology's no slip grip stays put so you can talk and drink water while whitening teeth The strip molds to the shape of your teeth and comes off cleanly Use once a day for 30 minutes Uses the same enamel-safe teeth whitening ingredients dentists use A comfortable, no-hassle at home teeth whitening experience