Our best-tested teeth whitening kit is on ultra-rare sale for just a few hours

Achieving a brighter smile can feel like an uphill battle, especially if you're a fan of coffee, tea, red wine ... or saving money. After all, in-office teeth whitening treatments can cost a pretty penny — laser whitening averages nearly $800 a pop, while take-home kits from the dentist can set you back around $400. But you deserve to show off your smile, and not spending an arm and a leg (or a tooth) is definitely something to smile about! That's why we suggest hopping on the Opalescence GO 15 Whitening Bundle while it's $53 (down from $62) on Lightning Deal. It's quick, easy to use and was our pick for the best overall teeth whitening treatment of 2025.

Why is this a good deal? 💰

This kit rarely goes on sale — in fact, our price trackers have registered less than a handful of price drops this entire year. With this Amazon Lightning Deal, you'll be able to score it for $53, down from $62; that's a definite savings versus in-office whitening treatments.

Why do I need this? 🤔

There's a reason why our testers chose the Opalescence GO 15 Whitening Bundle as the best teeth whitening product overall — actually, there are several. This kit includes 14 prefilled whitening trays (seven days' worth of treatments), which makes it a convenient, easy option for teeth whitening, as well as the brand's Teeth Whitening Toothpaste. Opalescence also promises visible results in just one week of use (up to five shades whiter!), and the experts recommend them too. "In my office, we use Opalescence," says Dr. Joyce Kahng, a cosmetic dentist in Los Angeles who recommends the brand's prefilled trays for her clients. "They're comfortable and cause less sensitivity," she explains, adding that she uses them herself at home.

What reviewers say 💬

With 5,000 Opalescence kits purchased from Amazon in the past month, this brand is definitely creating a legion of fans — and many have taken to the site to share their five-star reviews.

Pros 👍

"I've tried several whitening products over the years, but Opalescence strips really impressed me," marveled a user. "After using them, my teeth were noticeably whiter and brighter. I honestly wish I had taken before and after pictures to show the difference!"

"I was noticing stains on my teeth because of the coffee and tea that I drink. This stuff has really taken the stains away," shared another reviewer.

Several shoppers said their teeth were noticeably whiter even after a few uses: "My teeth were much whiter after using it for seven days," wrote one. Another added, "Just two treatments and my teeth are so much whiter!"

Cons 👎

This kit may make teeth feel sensitive, especially if you don't use it in conjunction with the toothpaste. "It will make your teeth VERY sensitive for a day or two, but it does as advertised and whitens your teeth," said a customer.

"The only downside was some sensitivity after a few uses, but the toothpaste they included really helped manage that," agreed the first fan above. "It made a big difference and kept the process comfortable enough to continue."

If you have Amazon Prime, you'll get free shipping, of course. Not yet a member? No problem. You can sign up for your free 30-day trial here. (And by the way, those without Prime still get free shipping on orders of $35 or more.)

The reviews quoted above reflect the most recent versions at the time of publication.

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