Amazon has the 2-Pack of 80oz Drano Max Gel Drain Clog Remover for $14.47 - 5% off with Subscribe & Save (can cancel anytime) - $4.27 off coupon (check “Save an extra” box, eligible on first S&S order for this product) = $9.48 with free shipping on $25+ or with Prime. $4.74 per bottle.