Abstract: A blank for a collapsible container formed from a single molding of plastics material and comprising a bottom wall, side-and end wall panels hinged to the bottom wall so that the wall panels can be erected from a collapsed to an upright position, and complementary locking member provided at adjacent end portions of the side-and end wall panels for securing the wall panels in upright position, the blank being adapted to be stacked unto like blanks for shipment and storage, the wall panels include formations which project beyond the interior surfaces of the wall panels and corresponding recesses are provided on the exterior surfaces of the wall panels and arranged to receive the projecting formations of a like blank positioned below.