When you think about teeth whitening products, the first thing that comes to mind is probably Crest Whitestrips. Sure, they’re a little foul-tasting and might make your teeth and gums feel off while using them, but there’s no question they work.

But a tooth-whitening product that temporarily turns your teeth purple... well, that’s a new one. But reviewers say the Hismile V34 tooth whitening color corrector serum, with its bright violet hue, works shockingly well. Unlike traditional teeth-whitening kits that brighten your smile over several days or weeks, Hismile’s bright violet serum offers a more instant solution without the use of harsh chemicals.

Using color-correcting technology, this purple goop utilizes a water-soluble purple dye to neutralize yellow undertones and deliver instant results by bringing out your teeth’s natural whiteness in the same way purple hair dye can neutralize brassiness.

Gentle enough for daily use and peroxide-free, you just need to dab it on a cotton swab and apply it to your teeth. You can brush and rinse afterward, and voila — your teeth are whiter. You can think of it as a concealer for yellow stains because the results are instant.

Skeptical, or simply worried you’ll be walking around with purple teeth? 81% of people who have purchased this product from Target give it 5 stars, and the reviewers have some promising things to say.