Amazon has the 3-Pack 8.8oz Drano Kitchen Granules Clog Remover for $11.82 - 30% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $7.68 with free shipping on $35+ or with Prime. Roughly $2.56 per box.