Food container

The design is features of shape, configuration, pattern and ornament of the food container as shown in the drawings. The broken lines shown in the drawings form no part of the claimed design. Drawings of the design are included wherein: FIG. 1 is a perspective view of a food container showing the design; FIG. 2 is an exploded perspective view of a food container of FIG. 1; FIG. 3 is a top plan view of the food container of FIG. 1; FIG. 4 is front elevation view of the food container of FIG. 1; FIG. 5 is a left side elevation view of the food container of FIG. 1; FIG. 6 is a rear elevation view of the food container of FIG. 1; FIG. 7 is a right side elevation view of the food container of FIG. 1; and FIG. 8 is a bottom plan view of the food container of FIG. 1.