Not many people would sign up for a one-way mission—thank goodness there are now drones to do the job for us.

Under a grant from DARPA, San Francisco-based Otherlab has built prototype drones out of cardboard that are designed to airdrop things like medicine, batteries, and communication devices into dangerous or hard-to-reach places.

The gliders are pre-programmed with their landing destination, then launched from a cargo plane or other aircraft (in tests, one was launched from a bigger drone). A small electronics package then steers each craft to its target. But with no motors and no need of a battery or fuel, they are meant to have as much room as possible for payload.

Drones have already delivered packages to paying Amazon customers and medicine to remote parts of Rwanda. The Department of Defense, too, is testing out drone swarms for a range of possible missions. But the idea of completely disposable, disintegrating drones is novel. On DARPA’s page for what it’s calling the ICARUS project, the agency states that it wants drones that “vanish into thin air” shortly after their missions are over.

To that end Otherlab’s Star Simpson, an engineer on the project, says that cardboard was only used to prove the design worked. The goal is to eventually make the drones’ bodies out of mycelium fibers—that is, mushrooms.

As Simpson told Air & Space, “Our preliminary work on that indicated that you can basically impregnate [mycelium] with different types of spores [which] are activated just before the vehicle is released.” The spores would grow and literally eat the drone, chewing through the body in about five or six days. As for the drone’s avionics, DARPA has a separate program funding the development of self-destructing electronics that would dovetail nicely.

Otherlab is no stranger to pursuing out-there ideas; it's been known to dabble in everything from renewable energy to inflatable robots. In a press release about the project, it suggests that a C-130 military transport plane could disperse hundreds of drones loaded with supplies across an area the size of California in a single flight.

So far, the Otherlab team has only tested models that are built to carry a payload of up to one kilogram, but Simpson says they could scale the design to make a drone with an eight-foot wingspan that can haul up to 10 kilograms.

(Read more: Air & Space, Recode, “A 100-Drone Swarm, Dropped from Jets, Plans Its Own Moves,” “Drones Set to Deliver Medicine to Remote Parts of the U.S.,” “An Amazon Drone Has Delivered Its First Products to a Paying Customer”)