Let’s say you’ve already upgraded to a good toothbrush; what’s the next step for cleaner teeth? Judging by the user reviews, this 20-count box of Crest 3D Whitestrips is a great place to start. As an added bonus, you’ll even get a pair of express one-hour treatments, for when a whiter smile just can’t wait. [20-Count Crest 3D Whitestrips + Two 1-Hour Express Treatments, $37 after $7 coupon]
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