Grape's Pack

Based on the description, i tried (even tough i'm not a designer) to think on something that could be useful, practical and occupying less space. I came up initially with a pyramidal design, but it was too bold and grumpy, then i tried to optimize the space by making folding parts, so after the carrying you could just fold and fill it in 1/4 of the space used before. It's basis is a rectangle, and it's conected with 2 triangles and 2 more rectangles that put all together in a vertical position end being closed by a clip in the top of the structure. It's designed so you can put it with the triangle facing up or facing down ,alternating the positions so it uses 100% of the space in the back of the truck or whatever ride it's.