No time to whiten your teeth, try Crest 3DWhite Teeth Whitening Pen! It's precision applicator makes it easy to use and compact for on-the-go whitening. The Crest 3DWhite Whitening Pen is enamel safe for daily use, for best results apply 2X a day for 14 days. The Crest Whitening Pen helps erase surface stains and uses the same whitening ingredient that dentists use. Keep one in your bag, bathroom or travel kit for daily, on-the-go whitening!