The design consists of the shape and configuration of the container as shown in the drawings. Brief Description of Drawings FIG. 1.1 is a perspective view from the front of the first position of the foldable container according to the present design. FIG. 1.2 is a front elevational view of the foldable container shown in FIG. 1.1. FIG. 1.3 is a back elevational view of the foldable container shown in FIG.1.1 and FIG.1.2. FIG. 1.4 is a left side elevational view of the foldable container shown in FIGS. 1.1 -1.3. FIG. 1.5 is a right side elevational view of the foldable container shown in FIGS. 1.1 -1.4. FIG. 1.6 is a top planar view of the foldable container shown in FIGS. 1.1 -1.5. FIG. 1.7 is a bottom planar view of the foldable container shown in FIGS. 1.1 -1.6. FIG. 1.8 is a perspective view from the front of the second position of the foldable container according to the present design. FIG. 1.9 is a front elevational view of the foldable container shown in FIG. 1.8. FIG. 1.10 is a back elevational view of the foldable container shown in FIG. 1.8 and FIG. 1.9. FIG. 1.11 is a left side elevational view of the foldable container shown in FIGS. 1.8-1.10. FIG. 1.12 is a right side elevational view of the foldable container shown in FIGS.1.8 -1.11. FIG. 1.13 is a top planar view of the foldable container shown in FIGS. 1.8-1.12. FIG. 1.14 is a bottom planar view of the foldable container shown in FIGS. 1.8-1.13. FIG. 1.15 is a perspective view from the front of the third position of the foldable container according to the present design. FIG. 1.16 is a front elevational view of the foldable container shown in FIG. 1.15. FIG. 1.17 is a back elevational view of the foldable container shown in FIG.1.15 and FIG.1.16. FIG. 1.18 is a left side elevational view of the foldable container shown in FIGS. 1.15-1.17. FIG. 1.19 is a right side elevational view of the foldable container shown in FIGS.1.15 -1.18. FIG. 1.20 is a top planar view of the foldable container shown in FIGS. 1.15 -1.19. FIG. 1.21 is a bottom planar view of the foldable container shown in FIGS. 1.15 -1.20. FIG. 1.22 is a top planar view from the fourth position of the foldable container according to the present design. The bottom planar view is identical. FIG. 1.23 is a perspective view from the front of the fifth position of the foldable container according to the present design. FIG. 1.24 is a left elevational view of the foldable container shown in FIG. 1.23. FIG. 1.25 is a top planar view of the foldable container shown in FIG. 1.23 and FIG. 1.24. FIG. 1.26 is a bottom planar view of the foldable container shown in FIGS. 1.23 - 1.25.