Colgate Optic White 3-Pack Tested: Surprising Stain-Taming Icy Fresh We put the 3-pack to the test and found ourselves intrigued by its promise of icey fresh results. The formula, infused with advanced hydrogen peroxide, delivered a noticeable lift to our teeth without the usual harshness-thanks to its enamel-safe claim. After a week of use, coffee and wine stains faded remarkably, leaving a visibly brighter smile. The minty, cool scent was a refreshing contrast to traditional toothpastes, making brushing feel like a spa treatment. While the whitening effect isn't instant, it builds steadily, offering a subtle but effective solution. The convenience of having three 3.2-oz tubes is a bonus, perfect for travel or daily routines. Though some may question the strength of hydrogen peroxide in such a compact form, our experience suggests it's well-balanced for everyday use. A solid choice for those seeking a gentler, stain-fighting alternative.