The ornamental design for a bentoboxfoodcontainer with contoured region, as shown and described.
FIG. 1 is a side top view of a bento box food container of the invention;
FIG. 2 is a side bottom view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a plan side view thereof;
FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 5.
FIG. 7 is a side top view of an assembly of a bento box food container of the invention in a jar;
FIG. 8 is a plan side view of a jar with a bento box food container of the invention inside; and,
FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 8.
The broken lines showing of the environment is for illustration purposes only and forms no part of the claimed design. The broken lines which define the boundaries of the claimed design form no part thereof.