The ornamental design for a collapsible shipping container, substantially as shown and described.
FIG. 1 is a perspective view of a collapsible shipping container showing our new design in its erect condition.
FIG. 2 is a perspective view showing the bottom surface; and
FIG. 3 is a perspective view showing the container in its collapsed condition.
The exterior surface opposite that shown on the right in FIG. 1 is identical except that the hinge is raised to effect the collapsing of the opposite sides one over the other as shown in FIG. 3 and the opposite interior surfaces are identical.