Between your Cinnamon Dolce Soy Latte and Pepsi addictions, your teeth could use a little love—and whitening. Colgate has a new product that could write away years of damaging stains, literally. The Colgate Optic White Toothbrush + Whitening Pen contains a built-in whitening pen for on-the-go whitening. It’s as simple as Brush. Whiten. Go. Brush –[...]