Amazon has the 12-Pack of Renuzit Solid Gel Air Freshener (7oz each, Pure Breeze Pet for Pet Odors) for $10.76- 5% off with Subscribe & Save (can cancel anytime) - $3.24 off (check “Save an extra” box, eligible on first S&S order for this product) = $6.98 with free shipping on $25+ or with Prime. Roughly 58 cents per cone.