I claim the ornamental design for the rectangular bin, as shown and described.
FIG. 1 is a top perspective view of a rectangular bin, showing my new design.
FIG. 2 is a bottom perspective view of the rectangular bin.
FIG. 3 is a left side view of the rectangular bin
FIG. 4 is a right side view of the rectangular bin.
FIG. 5 is a front view of the rectangular bin.
FIG. 6 is a rear view of the rectangular bin.
FIG. 7 is a top view of the rectangular bin; and,
FIG. 8 is a bottom view of the rectangular bin.
The broken lines depict portions of the article that form no part of the claimed design. The outer broken line at the bottom of the bin in FIGS. 2 and 8 represents a boundary such that the interior of the rectangular broken line forms no part of the claimed design. The pair of wavy long-dash short-dash lines in FIGS. 1, 2, and 5-8 form no part of the claimed design and represent an indeterminate length of the rectangular bin.