In honor of October Prime Day, you can shop Crest’s 3D Professional Effects Whitestrips for $30, instead of the usual $46, which is a 35% discount. Crest Whitestrips $46 Now $30 Crest's bestselling 3D Whitestrips have significantly dropped in price, and you don't want to miss out on this sale. Plus, they’re enamel safe and offer a no-slip grip, allowing you to talk and drink water while whitening teeth. Each treatment includes 20 teeth whitening treatments, each with one upper and one lower whitening strip, plus two bonus whitening treatments. Having a set of Crest 3D Whitestrips on hand to give your smile a boost is never a bad idea.