I'm a Deals Writer, and These Are the Last-Minute Prime Day Discounts Worth Shopping

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

There's a reason Crest 3D Whitestrips are a mainstay in most beauty cabinets — and you can get 44 strips for $30 on Prime Day. The strips claim to deliver a whiter smile in "just 22 days" thanks to hydrogen peroxide — and it works, according to our PS editor in her review of Crest 3D Whitestrips.

Editor Quote: "What truly impresses me about Crest 3D Whitestrips is their effectiveness. 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