Save 40% on teeth whitening kits with Crest's best deal of the year

*Save 40%:* Use code Y2K to save 40% on Crest 3D Whitestrips LED whitening kits through Sept. 20.

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When I was younger, I used to beg my mom to let me use some of her Crest whitening strips on my teeth. I was in elementary and middle school, so I definitely should not have been whitening my...