Go here to print the coupon got BOGO 20 ounce Coke. This is perfect if you use your Coke Rewards points to get coupons for a free 20 oz. Coke product. You'd get 2 free!
To learn more about My Coke Rewards, go here.
The Free 20 oz sparkling coupon is available for just 30 points. Each 20 oz. bottle has a code under the cap for 3 points, so you can get 1 free with every 10 purchased (aside from any other sale you might get!)