Several major apps have added 3D Touch support earlier today. Wunderlist and LinkedIn, for example, have brought out support for Home screen shortcuts and Peek and Pop gestures within the app with 3D Touch. And now, Starbucks has issued a similarly-themed update to its iPhone application in the App Store.
With Starbucks 3.3.4 for iOS, you can press the app's Home screen icon lightly on your iPhone 6s or iPhone 6s Plus to bring up a 3D Touch menu with several quick actions: Nearby Stores, Order, Reload Card and Pay.