Calling all Coke Rewards members! Check your email or account for a possible offer valid for a FREE Large Popcorn & Soda at AMC Theatres! The email is titled ''Get a large popcorn & Coke on us''. If you received the offer, simply enter in 5 product codes in the movie promo code box. After doing so, the coupon will be emailed to you. This offer is valid for a limited time only.