Once again, Starbucks is making spring afternoons a littler cooler and sweeter with its annual Happy Hour promo. From May 1-10, get any Frappuccino blended beverage for 50% off between 3 p.m. and 5 p.m. It’s the perfect opportunity to try its new S’mores Frappuccino. (Plus, the coffee shop is bringing back its popular Caramel Ribbon Crunch Frappuccino for a limited time.) My Starbucks Rewards members get an extra hour to sip on a bargain beverage, from 5 p.m. to 6 p.m. The deal is valid at participating locations, including most cafés located within other retail and grocery stores.