Don t have time to whiten your teeth at home, or the desire to spend money on an expensive dental office procedure? No problem! GO SMiLE s ON THE GO® Teeth Whitening Pen takes the time, expense, and hassle out of teeth whitening. You can whiten your teeth whenever and wherever you wish. It s easy to use and takes just seconds. Simply twist the dial on the bottom of the pre-filled pen to release the whitening serum. Brush it onto your teeth twice a day for 7 days to whiten your teeth, or use it once a day to maintain the results achieved with any of our other whitening formulas. ON THE GO Teeth Whitening Pen allows you to whiten your teeth comfortably and discreetly, without messy and time-consuming strips or trays. The soft brush tip evenly coats the surfaces of teeth, and allows you to get the whitenin.