Amazon has the 3-Pack 32oz Cleancult Dish Soap Liquid Refills (Wild Lavender or Lemon Verbena) for $21 - 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) = $14 with free shipping on $35+ or with Prime. Roughly 14 cents per ounce.