2X whitening action (Whitens teeth in 2 ways). Stain erasing cups + spiral bristles. For a whiter smile and healthier whole mouth clean (vs. brushing teeth alone with an ordinary flat-trim brush). 1. Stain Erasing Cups work with your toothpaste to help effectively remove surface stains for a whiter smile. 2. Our unique spiral bristle head design helps to whiten teeth by polishing away surface stains and clean hard to reach areas. 3. Cheek & tongue cleaner comfortably removes odor-causing bacteria.