Describing Objects and Actions
The general strategy:
Have different labels for referring to each object, the first intrinsic to the object, the second dependent on the use of the object by the person.
The description choice made at this point is to describe objects by size, using number sequences, i.e. rings #1 through #6; nesting boxes #1 through #4, in each case with higher numbers assigned to the objects with smaller dimension. Thus box1, as a concave-open-object, will contain box2 or any higher number and, when a non-concave face is considered, will support all higher number boxes.
These two images show first concave-open containment and second non-concave face support: