US Patent 7905353 Stackable containment trays and cases with slide latches

A stackable containment tray for receiving discrete articles for storage and/or sterilization according to one embodiment of the present invention comprises a combination of two side panels, a floor supported by the two side panels, an upper stack ring, and a lower stack ring, a pair of opposed handle lock brackets, and a pair of opposed bail handles. The upper and lower stack rings are identical to each other and provide the stacking capability. The bail handle of one tray is able to interfit into the handle lock bracket of an upper tray, thereby enabling the stacked combination of trays to be locked together.