The teeth-whitening pen is the quickest way to whiten your teeth, whether you're at the office, the gym, going on a date, or somewhere else! It was created with busy people in mind! You can whiten without having to commit to the longer time commitment of a whitening system with this portable pen that fits almost anywhere. To use, twist and brush onto teeth. brightens the surfaces and nooks of teeth. includes over fifteen whitening procedures. less than a minute to whiten.