The ornamental design for a displaycontainer, as shown and described.
FIG. 1 is perspective view of display container showing my new design; FIG.
2 is a rear elevational view thereof; the front elevational view being a
mirror image thereof; FIG. 3 is a top plan view thereof; FIG. 4 is a left
side elevational view thereof; the right elevational view being a mirror
thereof; and, FIG. 5 is a bottom plan view thereof. The broken line
showing of a watch is for illustrative purpose only and forms no part of
the claimed design.