If you have never tried whitening before, the Colgate Optic White Toothbrush + Built-In Whitening Pen is the perfect way whiten on the go. The whitening pen, fits neatly into the bottom of the toothbrush for easy storage and convenience to whiten right after you brush your teeth. Whether in the morning or at night, I love that whitening is a no-brainer. I can apply the whitening gel and go; no waiting to rinse it off or peel off strips. Combining the brush, with the gel and the Optic White Toothpaste, creates the ultimate whitening combination. Now my bright smile can stay bright!