Abstract: A shipping container for circuit boards and similar types of panels having a box and a cover, both formed of corrugated cardboard with bottom flaps extending entirely across the bottom of the container, the corrugations in the end walls oriented vertically, plastic panels secured on the inner sidewalls of the box and defining horizontal ribs and also plateau areas to bear against the side edges of the circuit boards, there also being vertical ribs projecting from the plateau areas to define grooves receiving the edges of the circuit boards; the ribs and grooves in opposite panels on the sidewalls nesting together when the box is collapsed and the end walls flexing to accommodate complete nesting of the ribs and grooves of the plastic panels.