I've never been a fan of whitening strips or overnight gels as they're uncomfortable and need to be used repeatedly for results, so this (highly effective) one-time treatment is a refreshing change.
Use the Rembrandt Whitening Kit on a lazy Sunday, when you're watching Sex and the City reruns, and you'll see results by the time Mr. Big reappears to steal the scene.
Retailer: Drugstore.com
Cost: $18.99 (SRP $20.25)
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