49 October Prime Day Deals You Don't Want to Miss

Crest 3D Whitestrips ($30, originally $46)

While indulging in a new pair of headphones or cozy slippers on Prime Day can be enticing, it's also an opportune moment to secure the essentials. Crest claims these can whiten your teeth "20 levels whiter in just 22 days." To test their effectiveness, one of our contributors put them to the test. See the results in our Crest 3D Whitestrips review.

Editor Quote: "The box boldly claimed they could "remove over 15 years of stains in three days," which initially made me a bit skeptical. However, the results speak for themselves. After just four treatments, the difference is already remarkable." — Marisa Petrarca, contributing editor, Commerce