Amazon and Wal-Mart envisage a future where small drones delivering goods to people zoom above pedestrians, cyclists and motorists.
But two Skype co-founders behind a London start-up have unveiled their self-driving delivery robot which bumbles along at about 6km/h.
That's slightly faster than a pedestrian but slower than a jogger.
Starship Technologies says the 18kg robot - which is 66cm long, 53cm wide and 55cm high - could make local deliveries in 30 minutes or less. The technology could be useful for neighbourhood restaurants and retailers. Because the robot requires almost no human involvement, Starship Technologies said it thinks the costs of delivering goods would drop. The slow speed and also removes some of the safety concerns with drone delivery.
A customer could follow the robot's progress on an app, and would be alerted when the delivery arrived. The customer would then use the app to unlock the cargo bay.