Uber wants to make sure you always hail one of its cars on your way to get a pumpkin spice latte, so it has latched itself onto Starbucks for iOS. The coffee shop has just updated its app to show a special Uber button, just like the one on Google Maps, a couple of weeks after the ride-sharing service released a free API to a bunch of partner companies, including United Airlines, Hyatt Hotels and TripAdvisor. This button launches Uber from within the app, so you obviously need to have both software on your device for the scheme to work. That's not such a bad deal, though -- you might suddenly need it for a ride or to get lunch delivered to your doorstep... assuming Uber's not banned where you live.