A portable grain storage bin including a circular sidewall having a top edge and a bottom edge, a conical cover coupled to and extending upwardly and radially inwardly from the top edge of the circular sidewall, to an opening and a partial floor extending radially inwardly from the bottom edge of the circular sidewall and terminating at a free edge. The circular sidewall, conical cover and partial floor are movable between a collapsed configuration when empty and a deployed configuration when filled.
