Starbucks is helping to make going green a lot easier. In an effort to reduce waste of disposable coffee cups, the coffee giant is now selling a $1 reusable cup modeled after their iconic paper cup. Customers who use any reusable cups are rewarded with a 10-cent discount for each refill. And in an effort to reduce waste from plastic gift cards, a new mobile app for your iPhone or Android phone lets you pay for your order with your phone. No waste and no fuss.