In the future, robots and drones will be used to make deliveries. Right now, multiple companies are testing these technologies to perfect them for the future. The Flytrex drone delivery system is currently being tested in Iceland. A modified DJI Matrice 600 hexocopter is used to deliver food across a bay of the North Atlantic Ocean.
The drone can carry 3kg packages for up to 6 miles. More information is available here.