Starbucks Rewards members! Check your emails for a possible offer valid for a FREE Handcrafted Beverage with ANY Food or Beverage Purchase when you pay using your Starbucks card in the Starbucks app! The email is titled ''Here's a drink on us''. Your coupon valid for a free beverage will automatically be loaded to your account within 24 hours after your purchase and will be valid for 7 days. This freebie is valid through May 13th.