Free Diet Coke 12oz Slim Can at Giant Eagle Load the coupon to your Giant Eagle Advantage Card. Coupon valid through 3/7. Free Diet Coke 12oz Slim Can at Giant Eagle No related posts. Sign up for our daily newsletter and never miss a deal again! As a subscriber, you'll be the first to know about new offers and discounts on SweetFreeStuff.com! Enter your e-mail: