Baby's Only Formula Products Mail-In-Offer ( unknown expiration date ) The Offer: 2 free units of Baby’s Only Organic® formula The Products: Babys Only formula Products The Requirements: For every 24 proofs of purchase saved from one of our formula products, we will send a coupon for 2 free units of Baby’s Only Organic® formula through mail-in rebate. That is our way of saying "thanks" for buying and supporting our products. Or, instead of receiving free formula, you may pledge your product to Feed the Children, a non-profit agency that helps feed hungry children all over the world. http://www.naturesone.com/rebate-form.php