The brand claims your teeth will whiten by four to six shades. You'll want to snag this three-pack before the coupon ...

To use, simply twist the pen to dispense the gel onto the brush, then apply a thin layer of the whitening gel directly onto your teeth. Wait for a brief 10-minute period before rinsing with water, ...

a whitening pen might be your best bet. Auraglow’s whitening gel dispenses with the click of a button on the bottom of the pen, so you don’t have to dip a brush repeatedly. The rest of the ...