Review on 😁 VieBeauti Teeth Whitening Pen (2 Pack) - 20+ Uses, Effective, Painless, No Sensitivity, Travel-Friendly, Easy to Use - Achieve a Beautiful White Smile with Natural Mint Flavor by Kimberly Choi

This product doesn't work at all! The idea may be simple; However, this is not really effective as the whitening paste does not stay on the teeth long enough to produce a whitening effect. You spit it all out a few seconds after applying it because it's impossible to stop the flow of saliva. This company offers a $20 gift card or a free item of the same kind if you give a good rating. If you're not happy, they want you to email them a separate email about it. However, I don't like this approach as I rely heavily on reviews and want to know directly from users whether the product I'm buying is working or not.