25 Last-Chance Prime Day Deals Our Editors Aren't Leaving in Their Carts

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

This Crest 3D Whitestrips kit comes with a total of 44 strips, including two bonus one-hour express treatments. The key ingredient here is hydrogen peroxide, which helps lift stains from coffee, tea, and wine. Apply the no-slip strips to top and bottom teeth, let them sit for 30 minutes, and remove them. One PS editor detailed her experience using the strips in her review of the Crest 3D Whitestrips.

Editor Quote: "After just four treatments, the difference is already remarkable. The 'before' image on the left and the 'after' image on the right clearly show the noticeable change. And I've barely made a dent in the box with plenty of treatments left." — MP