The ornamental design for a foodstoragecontainer, as shown and described.
FIG. 1 is a front, right and top perspective view of a food storage container, showing my design.
FIG. 2 is a rear, left and bottom perspective view thereof.
FIG. 3 is a front elevation view thereof.
FIG. 4 is a rear elevation view thereof.
FIG. 5 is a left side elevation view thereof.
FIG. 6 is a right side elevation view thereof.
FIG. 7 is a top plan view thereof.
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is front, right and top perspective view thereof, in use with an exemplary utensil.
The broken lines shown in the drawings illustrate both parts of the article as well as environmental subject matter of an exemplary utensil. None of the broken lines form part of the claim.