The on-demand platform will transport customers' tricks or treats from the specialty retailer’s 1,525 pop-up shops across the U.S. and Canada.

A new joint venture between Uber’s Serve Robotics sidewalk delivery drones and Alphabet’s Wing flying drone service will do a dual test run. Both tech companies hope that flying and sidewalk drones can cover areas its counterpart can’t and speed up delivery times.

Drones and sidewalk delivery robots promise to make last-mile delivery cheaper and more efficient, but they both have their limitations. Drones have trouble touching down in dense urban areas, and sidewalk robots tap out after a couple of miles.