Rubbermaid Roughneck 10 Gal with the handle similar to the one that came with the Phantom, and a foam bottom pad with slits cut for landing legs, transmitter handle, battery and GoPro.
I hit the nearby Target and couldn't quite find a 10gal bucket, but did find a $10 18Gal that I'll be using.
(i figured I'd go the cheap case route as well, put the extra $ towards batteries and extra props!@#)