Amazon has the 68oz Method All-Purpose Cleaner Refill (Pink Grapefruit) for $8.29 - 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) = $5.81 with free shipping on $35+ or with Prime. Roughly 8.5 cents per ounce.