HURRY! FREE Horizon Mac & Cheese Coupon (1st 25,000!) July 28, 2014 By: SMFMcommentShare The Savings! Rush on over to the Horizon Organic Facebook page, â€œlikeâ€ them, and click on the Mac & Cheese Coupon tab to request a coupon for a FREE Horizon Mac & Cheese 6oz box (up to $3.39 value). This freebie is only available for the first 25,000 so act fast!