Here's a coupon for our Ontario-based fans of Carnation Instant Breakfast! Just print and present this page for a free carton of Carnation Instant Breakfast Essentials ($2.29 value) from January 21-27. There's a limit of one coupon per person and the offer is valid while supplies last.This offer is valid at Mac's Convenience Store locations in Ontario only -- use this page to find the store nearest you.