Think your whitening toothpaste is giving you the whitest smile you can get? Think again. Crest 3D White Glamorous White Whitestrips remove 10 years of stains and whiten teeth 25x better than a leading whitening toothpaste. Their no slip grip means the strips stay put until you take them off, allowing you to talk and even drink water while whitening your teeth. Using them just once a day for 30 minutes elevates your whiter smile to the next level. when toothpaste is used for 4 weeks