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.

Overall ease of use of the toothbrush including evaluation of the weight, handle comfort, ease of removing the brush-heads, etc. The Colgate 360 Advanced Whitening Soft is part of the Toothbrushes ...

Or, opt for the über comfortable Colgate Optic White ComfortFit LED Teeth Whitening Kit ... Bonus points for Moon's Platinum Advanced Teeth Whitening Pen, which was co-designed with Kendall ...