A durable lightweight knockdown container in which abutting panels of the container are releasably held in assembled position on a base partially to complete the container for loading. The remaining panel or panels are then simply and expeditiously secured in place to complete the container for shipment. Continuous interengageable connectors along abutting edges of the container panels inhibit bowing or separation of the panel edges under load without external straps while at the same time permitting easy disassembly of the container without the use of tools.