Calling all My Coke Rewards Members! Get your FREE Large Popcorn at AMC Theaters when you enter 5 codes! You can also snag a FREE Large Drink when you enter in 5 codes. Just log in to your account, scroll down the page until you see ''Upgrade Your Movie Night with a Coca-Cola'' box and enter your codes. Limit one of type of reward per person. This freebie is valid through November 19th.