Source: Tacocopter: One-click Taco Delivery in the SF Bay Area
Stashed in: Flying!, Tacos!
Now there's LobsterCopter for the East Coast. :)
See also: Tacocopter basics
And: NYU student builds a robot that builds burritos
Multi-purpose wings allow flying robot to walk across rough terrain | Robohub
A Swarm of Nano Quadrotors - YouTube
New Goodyear blimp will fly soon