Amazon offers the Colgate Optic White Toothbrush with Built-In Whitening Pen in Medium, model no. 55652, for $7.44 with free shipping via the directions below. (It's also available in Soft, model no. 55653, for 15 cents more.) That's about $6 less than local grocery stores charge. The whitening brush purports to get teeth whiter in just two days. To get this deal:
  1. View the Colgate Optic White Toothbrush with Built-In Whitening Pen for $9.92
  2. clip the 20% off coupon
  3. add it to your cart via Subscribe & Save for a final price of $7.44
Be sure to cancel your subscription once your order ships to avoid being billed for further shipments.