Today, December 14, Starbucks Rewards members can score 50% off ANY handcrafted drink from 12pm until 6pm local time at participating stores. The Yay Day coupon will be available in your Starbucks app which can be applied at checkout on the app or at the register. If you're not a member, join now and download the Starbucks app. Limit one handcrafted drink per member.