FIG. 1 is a top perspective view of a lunchbox, showing our new design in a closed configuration;
FIG. 2 is a bottom perspective view of FIG. 1;
FIG. 3 is a top plan view of FIG. 1;
FIG. 4 is a bottom plan view of FIG. 1;
FIG. 5 is a left-side elevational view of FIG. 1;
FIG. 6 is a right-side elevational view of FIG. 1;
FIG. 7 is a front elevational view of FIG. 1;
FIG. 8 is a rear elevational view of FIG. 1;
FIG. 9 is a top perspective view thereof, illustrated in an open configuration;
FIG. 10 is a bottom perspective view of FIG. 9;
FIG. 11 is a top plan view of FIG. 9;
FIG. 12 is a bottom plan view of FIG. 9;
FIG. 13 is a rear elevational view of FIG. 9;
FIG. 14 is a front elevational view of FIG. 9;
FIG. 15 is a left-side elevational view of FIG. 9; and,
FIG. 16 is a right-side elevational view of FIG. 9.
The broken lines shown in FIGS. 2, 4, 10, and 12 on the bottom surface of the lunchbox illustrating a logo and logo plate depict environmental subject matter that forms no part of the claimed design. All other broken lines depict portions of the lunchbox that form no part of the claimed design.