The ornamental design for a container for a plunger, as shown and described.
FIG. 1 is a top and front perspective view of a container for a plunger
showing my new design, the rear being identical in appearance;
FIG. 2 is an exploded front perspective view thereof; and,
FIG. 3 is an enlarged vertical cross-sectional view thereof.
The unornamented bottom is not disclosed. The broken line showing of a
plunger in FIG. 3 is for illustrative purposes only and forms no part of
the claimed design.