A Domino's customer who requests a drone delivery will receive a notification when their delivery is approaching. After going outside and hitting a button on their smartphone, the drone will lower the food via a tether. Once the package is released, the drone pulls the tether back up and flies back to the Domino's store.
Robotics Trends has video from the flight, and reports that Domino's is also testing a pizza-delivering robot. Their Domino's Robotics Unit "has four wheels, is less than three feet tall, and has a heated compartment that can hold up to 10 pizzas. It can deliver pizzas within a 12.5-mile radius before needing to be recharged."