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.

In-office whitening treatments can be expensive, so many people turn to at-home teeth whitening. Here's what you need to whiten your teeth at home.

To round up the best teeth whitening kits, we asked oral care experts for their input and tested several top options ...

We found a three-pack of teeth-whitening pens for only $9.99. These regularly retail for $19.99, but after clipping the 50% ...

The gel takes a bit of effort to remove This teeth whitening pen works by aiming to reverse discolouration caused by food and drinks. And, with Colgate being an OG oral hygiene brand, expectations ...

but there's a lot to love about the MySmile Teeth Whitening Pen, which pledges to get rid of stains from smoking, coffee, and wine. Besides having a 4.3-star rating from buyers who absolutely love ...

It has aloe vera in it, too, which Dr. Huang says is soothing to teeth. If you want a paint-it-on option that’s a bit easier to manage than Bite’s kit, a whitening pen might be your best bet.

Gem Teeth Whitening Pen PAP is formulated with PAP ... I was initially very sceptical of this £24 Colgate toothpaste. It's almost £10 more expensive than most of Colgate’s other whitening ...