Amazon has the 68oz Method All-Purpose Cleaner Refill (Pink Grapefruit) for $7.98 - 25% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $5.59 with free shipping on $35+ or with Prime. Roughly 8.2 cents per ounce.