Disposable Drones?

San Francisco  based R&D firm, Otherlab, is being funded by DARPA in a quest to develop low cost, "disposable" drones that can deliver time-sensitive items such as food  in emergency or disaster situations. Currently the drones are constructed mainly of cardboard, with low cost electronics. DARPA is funding a second project to develop degradable electronics as well so that the entire drone can be deployed, delivered, and forgotten about.

http://spectrum.ieee.org/automaton/robotics/drones/otherlab-apsara-aerial-delivery-system