My Coke Rewards offers triple points when you purchase a 20-oz. Coke bottle at Dunkin' Donuts and enter the unique code on your bottle cap. That's the first such offer we've seen from My Coke Rewards. (We saw double points with the purchase of any Coke Zero bottle two weeks ago.) My Coke Rewards allows you to redeem points for magazine subscriptions, travel discounts, and Coca-Cola products. This offer can be redeemed up to six times per person. Deal ends September 1.