GO SMILE Stain Erasers are portable and fast teeth whitening applicators that prevent daily stains from setting into your teeth and give you a minty "just brushed" feeling. Every day, your teeth are exposed to food and drinks that can stain your teeth. Since teeth are porous, the stains can soak deep inside the enamel unless you act quickly. Keep our GO SMILE Stain Erasers on hand, and you can erase stains before they set into your teeth. Apply anytime, anywhere-Just Flip, Pop, and Erase!