Abstract: A container comprising a receptacle having a bottom wall, upstanding side walls and upstanding end walls; a peripheral primary flange structure integral with the side and end walls, and projecting outwardly from upper extents of the side and end walls; a lid fitting over the receptacle, the flange structure providing rail structure to seat the lid as the lid slides endwise forwardly into receptacle closing position; and multiple interfitting and interlocking structure on the lid and on the primary flange structure to progressively interfit and lock the lid to the receptacle as the lid slides endwise into the receptacle closing position.

Abstract: An inexpensive molded plastic tray or receptacle constructed with ribs, slots and bumpers to fittingly receive the lower portion of a standard, i.e. older type tote box, the tray also being constructed to be recognized by sensors in an automatic retrieval and storage system so as to be controllably moved in that system along with its received standard tote box.