Amazon has the 4-Pack 4.8oz Colgate Total Whitening Toothpaste with Stannous Fluoride and Zinc (Whitening Mint) for $11.92 - $4 off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel at any time) = $7.32 with free shipping on $25 or with Prime.