Your next delivery might not come from a human. Food delivery service DoorDash recently introduced Dot, an autonomous robot that can drop off meals and groceries for customers. Dot—which travels up to 20 miles per hour—is already zipping along streets and sidewalks in Tempe and Mesa, Arizona. And DoorDash isn’t alone in turning to robots: Amazon and Walmart say they’re developing delivery drones, while a company called Starship Technologies runs food-delivery bots in cities and on college campuses. Right now, though, navigating densely populated areas can be difficult for delivery robots. Another challenge is that not everyone wants them around. But experts say Dot’s design will help, as research shows that robots with humanlike features are more likely to be welcomed. “Being adorable can help a delivery robot succeed,” says Nikolas Martelaro, an assistant professor at Carnegie Mellon University’s Human-Computer Interaction Institute. “Programming it to be well-behaved helps too.”