It wouldn't be Prime Day without this $29 Crest Whitestrips deal
SAVE 35%: As of Oct. 5, the Crest 3D Whitestrips Professional Effects kit is on sale for $29.99 at Amazon — down from $45.99 for a limited time.
We’ve seen plenty of the best early Prime Day deals, even before the Big Deal Days event starting on Oct. 7 and 8, but this Crest 3D Whitestrips discount is one that literally shines.
In honor of Amazon Prime Day, the fan-favorite whitening kit is back down to $29.99, a 35% savings off its usual $45.99 price tag. For anyone who’s been eyeing an at-home smile refresh before holiday season selfies kick in, now’s the time to stock up.
The Crest 3D Whitestrips Professional Effects kit comes with 22 treatments total (20 regular and two bonus 1-hour express treatments) and 44 strips overall. It’s designed to whiten like a $400 professional treatment, using the same hydrogen peroxide ingredient that dentists rely on, while staying gentle and enamel-safe.
Thanks to Advanced Seal Technology, the strips grip securely to your teeth so you can still sip water or talk without worrying about them sliding off. That’s a small but meaningful win for multitaskers.
Crest has also advised that you can achieve whitening results of up to 19 levels brighter, with a noticeably whiter smile after just a few uses. Altogether, you’re being promised a 100% visibly whiter smile, guaranteed.
Each treatment takes about 45 minutes, with the 1-Hour Express strips offering faster touch-ups when you need a last-minute glow-up. Whilst some customers on Amazon left reviews mentioning mild sensitivity, most agree it’s a small trade-off for how effective these strips are at erasing coffee, tea, and wine stains that have built up over time.
Crest is still the #1 dentist-recommended at-home whitening brand, and this kit has more than 98,000 five-star ratings on Amazon to prove it. Prime members can snag free delivery and lock in this limited-time price while it lasts.
Ben Williams is a freelance writer at Mashable, having joined the team in June 2025. With over 10 years experience in gaming, tech, TV, anime, and film, there’s nothing he hasn’t covered. Alongside Ben’s other work at IGN, Radio Times, Eurogamer, UNILAD Tech, and Rock Paper Shotgun, he also has bylines at sites like GamesRadar+, PCGamesN, ScreenSphere, Twinfinite, ScreenRant, GGRecon, and more.
When away from writing, he spends his downtime playing and watching games, films, and shows he loves covering — whether it’s replaying The Last of Us Part 2, catching Pokémon, rewatching Fullmetal Alchemist: Brotherhood, or bingeing Tarantino movies.
