Crest 3D White Luxe Whitestrips, $5 off various boxes

Let’s say you’ve already upgraded to a good toothbrush; what’s the next step for cleaner teeth? Judging by the user reviews, these Crest 3D Whistrip packs are a good place to start. Amazon’s offering a $5 coupon on various packs, so pick your favorite, and don’t forget to smile bright when you see the discount at checkout.