From the manufacturer
About this item Getting a radiant whiter smile while you sleep is now super easy with the Colgate Max White Overnight Teeth Whitening Pen This brilliant teeth whitening pen reverses 15 years of discolouration caused by food and drinks in just 3 weeks with continued use The Colgate Whitening Pen is enamel safe The teeth whitening pen is super easy to use with just 3 simple steps Get effective teeth whitening at home and a dazzling, confident smile with this amazing teeth whitening pen that gives you 35 nightly treatments From the manufacturer