The ornamental design for a bootcontainer, as shown and described.
FIG. 1 is a front view of a boot container showing my new design;
FIG. 2 is a rear view of the boot container;
FIG. 3 is a rear, interior view of the boot container;
FIG. 4 is a side view of the boot container;
FIG. 5 is a top view of the boot container; and,
FIG. 6 is a bottom view of the boot container.
The broken line showing of an element in the interior of the boot container in FIG. 3 is included for the purpose of illustrating portions of the boot container and forms no part of the claimed design.
The broken lines along the folds and edges of the boot container depict stitching.