The ornamental design for a clamshellpackagingcontainer, as shown and described.
FIG. 1 is a perspective view of a clamshell packaging container in an open configuration;
FIG. 2 is a rear view of the clamshell packaging container of FIG. 1 in an open configuration;
FIG. 3 is a front view of the clamshell packaging container of FIG. 1 in an open configuration;
FIG. 4 is a right view of the clamshell packaging container of FIG. 1 in an open configuration;
FIG. 5 is a left view of the clamshell packaging container of FIG. 1 in an open configuration;
FIG. 6 is a top view of the clamshell packaging container of FIG. 1 in an open configuration; and,
FIG. 7 is a bottom view of the clamshell packaging container of FIG. 1 in an open configuration.
In the drawings, the broken lines are for the purpose of illustrating portions of the clamshell packaging container that form no part of the claimed design.