MyCokeRewards double points on Diet Coke 12-packs

Hang on to your MyCokeRewards Diet Coke 12-pack codes, because coming up, from 5/27/13 - 5/31/13, you'll get double points (20 instead of 10 points) for each Diet Coke 12-pack code you enter, with no limit on the amount of bonus points.  That means that if you buy two 12 packs, you'll automatically have enough points for a free 20 oz. bottle of any Coke product.