“Hoffman” – cube
Watch out. Not that easy!
The 27 pieces are not cubes, but 3 different side sized billets. The box to keep the pieces is an equal side sized cube. There is only one possible way to fit all the pieces into the box and filling that perfectly.
And when you plan to build from these billets any construction, you have to consider their size difference, and be very precise.
The nature-color one makes probably even more difficult to fit the pieces in the box. However, when it is rightly done, it will give more satisfactions, too.