Crest Whitestrips Under $30 Ahead of Amazon Prime Big Deal Days

Crest Whitestrips are under $30 today as part of Amazon’s early Prime Big Deal Days, offering a 35% discount that is noted as cheaper than the Prime Day price from last summer. The savings arrive ahead of Amazon Prime Big Deal Days, which are scheduled for Oct. 7–8, and Prime members can access the deal today while supplies last.

The deal centers on Crest 3D Whitestrips Professional Effects Plus, a kit described as containing 20 whitening treatments, each with one upper and one lower whitening strip for a total of 40 strips. The kit also includes two bonus one-hour express whitening treatments, totaling four more strips and bringing the grand total to 44 strips. The manufacturer notes that the kit is designed for 24 daily applications, with users applying the strips for 30 minutes each day. Users can wear the strips during daily activities, including talking and drinking water, which makes it a convenient option for people with busy routines.

Amazon’s early Big Deal Days promotion is described as an opportunity for Prime members to save before the main two-day event. The price reduction is framed as a limited-time offer, with stock not guaranteed to last through the day. Shoppers are advised to act quickly to secure the kit at the discounted price before it returns to its regular price or sells out.

Consumer reviews highlighted in the coverage emphasize perceived effectiveness and value. One user, AAndC, wrote that their dentist noted over-the-counter whitening products are now broadly competitive with in-office options. They added that the packet provided enough strips for both people in the household, with enough remaining for maintenance over a year, and acknowledged that, while the upfront cost can feel high, the pack can last for at least 12 months for two people.

“My dentist stated that over the counter products are pretty much as effective as in-office products now. My fiance and I purchase these strips and saw immediate and significant differences in the color of both of our smiles. There were so many strips provided in this packet that both of us were able to use these to the point that we were both happy with this purchase and still had more left over to continue to use for maintenance in the future. So even though it might feel expensive, this pack could last the two of us for at least a year. […]”

Another reviewer, Donnie, noted visible results after using the 1-hour express strips included in the kit. They described their teeth as “GLOWING,” adding that the whitening was impressive but acknowledged a temporary increase in sensitivity that relaxed over a few hours.

“My teeth were so stained from coffee and tea, and I was very self-conscious of it, but literally after using just the 1 hour express ones that it comes with (it comes with 2 of them) I used one today and one 2 days ago, my teeth are GLOWING they aren’t yellow anymore and they are actually white for once, I was skeptical at first but these actually work Scarily well, they do make my teeth a little more sensitive right after using and that slowly fades over the next few hours.”

A third reviewer, MaRyan R., described navigating a crowded lower arch and noted progress after a few days, reporting that the whitening appeared to be improving even before a professional cleaning. They observed that the strips required some careful placement around crowded teeth but that the results were worth it and that sensitivity was minimal.

“My bottom teeth are pretty crowded, and gnarly. I have a 4 tooth upper bridge where my front 2 teeth had been knocked out on a fall when I was 7. I wasn’t sure if these whitening strips would work on my teeth. I am on day 5 of using the strips, and I can tell already that my permanent teeth are lightening up! They look better now, than after a cleaning at my dentist! I have to kind of tuck the strips onto my bottom teeth, bc they are so crowded, but they work! I haven’t noticed any teeth sensitivity yet, but my gums are a tad irritated from the strips. Nothing so troublesome that I would discontinue using them. I’m very happy with this purchase.”

Beyond the Crest offer itself, HuffPost Shopping's overview highlights a broader dental-upgrade mindset, noting professional opinions on complementary products. For instance, dental practitioners cited favor a good electric toothbrush, with particular emphasis on models that help users monitor brushing technique. One clinician referenced the Oral-B iO Series 9 as a favorite and described features that guide users toward “just right” brushing force and coverage via an app. The iO Series 9 is listed at a discount as part of a broader sale on cleaning tools, with multiple cleaning modes and travel accessories mentioned.

In addition to electronic toothbrushes, the round-up mentions fluoride-based and fluoride-free options, including fluoride-containing toothpaste with ADA acceptance and fluoride-free nano hydroxyapatite toothpaste for sensitive teeth. The recommendations also extend to specialized flossing tools and water-flossers, such as a Cocofloss-branded manual brush and a Waterpik Sonic Fusion 2.0 that combines brushing and flossing functionality. The tone remains focused on credible shopping deals rather than speculation about future price movements.

The discount landscape for dental care products this season—Crest Whitestrips at under $30 ahead of Prime Big Deal Days, plus substantial discounts on electric toothbrushes, toothpaste, floss, and related gadgets—highlights how shoppers may plan purchases around major online sales events. While Prime Big Deal Days are widely anticipated, the current offer provides a concrete, time-limited price point that could influence consumer buying patterns in the days leading up to Oct. 7–8. As with any deal, customers are urged to verify eligibility for Prime savings and to confirm stock before purchase.

In a market where at-home whitening products compete with in-office procedures, promotions like this one can shape consumer expectations about value and effectiveness. By tying a historically strong product line to a major shopping event, retailers aim to drive traffic and convert interest into quick purchases before stock diminishes. For shoppers seeking a brighter smile, the Crest Whitestrips deal represents a notable opportunity to stock up at a fraction of the price commonly observed in other retail cycles, while Prime members prepare for the two-day event slated for early October.