My goal when designing this box was reusing the strips of paper which are left over when a square is cut off from an A4 piece of paper. This strip also happens to have dollar bill proportions.
The side of the box can be anywhere from just below ¼ to ⅕ of the square’s side which matches the shrink factor of many box lids. This way the whole A4 sheet can be used without any waste: the square for the lid and the leftover strip for the box’s body, and that’s why I called it Eco Box.
The structure of the model is quite similar to some of Shuzo Fujimoto’s boxes and while I haven't seen exactly the same model before, I wouldn’t be surprised if Fujimoto himself or someone else had the same idea before me.