Amazon has now launched a new Colgate teeth whitening sale event to get your smile in shape for the new year. One standout option here has the Colgate Optic White Overnight Teeth Whitening Pen on sale for $13.99 with free shipping for Prime members or in orders over $25. You can drop the total down to $13.29 by opting for Subscribe & Save on the listing page, just remember to cancel the sub after your order ships. Regularly $25, it more typically sells for $20 at Amazon and is now at one of the lowest prices we have ever tracked. This pen form-factor makes it easy to cover all of your teeth or target specific problem areas. The formula is powered by “hydrogen peroxide and is safe for sensitive teeth and gums,” and this package ships with 35 nightly treatments for the price of entry. Head below for more.