Price drop! Prime members only. Amazon has the 4-Pack of Crest 3D White Advanced Luminous Toothpaste (3.7oz each) for $11.99 - $5 off coupon (check “Save an extra” box, eligible on first S&S order for this product) = $6.99 with free shipping on $35+ or with Prime (extra 5% off for 5+ subscribe and save orders).