Adaptable bin with folding secondary bin

An adaptable bin, comprising:

• a bin floor;
• two bin side walls;
• two bin end walls, wherein the bin floor, the bin side walls, and the bin end walls define a primary storage volume;
• a bin opening defined by the bin side walls and the bin end walls, wherein the bin opening allows access to the primary storage volume;
• a first guide slot formed in one of the bin side walls substantially parallel to the opening;
• a second guide slot formed in the bin side wall opposite the first guide slot and substantially parallel to the opening;
• a secondary shelf operatively attached to one of the bin end walls and moveable between a collapsed position and an expanded position, wherein the secondary shelf selectively defines a secondary storage volume within the primary storage volume when in the expanded position, including:
• a first shelf segment;
• a first hinge rotatably connecting the first shelf segment to one of the bin end walls, wherein the first shelf segment is substantially parallel to the one of the bin end walls in the collapsed position and substantially perpendicular to the one of the bin end walls in the expanded position;
• a second shelf segment;
• and
• a second hinge rotatably connecting the second shelf segment to first shelf segment, wherein the second shelf segment is substantially parallel to the one of the bin end walls in the collapsed position and substantially perpendicular to the one of the bin end walls in the expanded position;
• a first pin formed on the secondary shelf, wherein the pin slides through the first guide slot between the collapsed position and the expanded position;
• and
• a second pin formed on the secondary shelf opposite the first pin, wherein the second pin slides through the second guide slot between the collapsed position and the expanded position.