US Patent 7654402 Collapsible container

A collapsible container with angularly related multiple folding sections, each section extending at an angle to the vertical and including, within each section itself, a flexure zone adjacent the angular joint between adjacent sections and flexibly movable between a first open position in the expanded container and a second position folded upon itself in the collapsed container, the flexure zones resisting movement of the sections in both the fully expanded container and the collapsed container, as well as any intermediate position wherein only selected flexure zones are in an open position.