The ornamental design for a multi-compartment foldable box, as shown and described.
FIG. 1 is a top perspective view of a multi-compartment foldable box in a folded state showing the new design;
FIG. 2 is another top perspective view in a partially folded state;
FIG. 3 is a top view in a folded state;
FIG. 4 is a bottom view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a left side view thereof;
FIG. 8 is a right side view thereof;
FIG. 9 is a bottom view thereof in an unfolded state;
FIG. 10 is a top view thereof in an unfolded state;
FIG. 11 is another top view in a state of use; and,
FIG. 12 is another perspective view in a state of use.
The short dash lines in the drawings depict portions of the multi-compartment foldable box that form no part of the claimed design. The long dash broken lines in FIGS. 11 and 12 depict environmental subject matter and form no part of the claimed design. The dot dash dot broken lines depict boundaries of the claim and form no part thereof.