Purpose Oral Care Manufacturer P & G-Health Directions Replace brush every 3 months. Do not chew or bite on brush. Uses The brand more dentists use themselves, worldwide. How do the flexing sides work? This product has individually flexing sides that adjust to the unique curves and contours of your teeth and gums for an all-around clean and an invigorating whitening experience. How does the stain eraser work? It has a uniquely-shaped stain eraser that gently polishes to help whiten your teeth. It works together with the bristles and helps to remove up to 90% of the surface stains on your teeth, including stains in hard to reach areas like along the gumline and in-between teeth. Warnings Not intended for children 6 years and under.