They'll be controlled by a nearby waiter with an iPad, and will deliver food at speeds of 25 mph.
A video from The Guardian of the trays in action (watch at the bottom of this post) proves that this might not be such a great idea — most of the food winds up on the street instead of the table. Business Insider's Kevin Smith and William Wei previously tested a similar drone, and found it extremely hard to maneuver.
But YO! Sushi isn't the only food company taking to the skies. TIME reports that there is also a San Francisco-based restaurant that's delivering Burrito "bombs" with a flying drone, and Domino's is considering a "DomiCopter" to transport in the UK and Ireland.