Amazon has the 6-Pack 4.2oz Listerine Essential Care Toothpaste (Powerful Mint Flavor) on sale for $21 - 35% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $14 with free shipping on $35+ or with Prime. Roughly $2.33 per tube.