Please note, prices are accurate at the date of publication, August 9, 2023, but are subject to change. With over 50,000 reviews on Amazon, this Colgate teeth whitening pen is a bestseller.

On this episode of Take My Money, PureWow creator Kate Kesselman finally got her hands on the viral Colgate Optic White Overnight Teeth Whitening Pen ($25; $19) and decided to put it to the test ...