A kit like this normally retails for nearly $30, but it’s down to the lowest price we’ve seen. The kit includes 10 treatments that can last for 12 months and beyond, plus two 1-Hour Express White Strips. When used for 30 minutes per day, the Professional Effects strips will reveal a whiter smile after just three days, while the 1-Hour Express strips work to whiten in just one hour, so your smile can really sparkle at any last-minute events.
Crest says the strips whiten 25 times better than a teeth-whitening toothpaste can in four weeks. Plus, with a no-slip grip, the strips stay put, so you can talk normally and even drink water while you whiten.