A good pencil holder must be able to accommodate stationery of various heights. This presents a design challenge for woodworkers. From production point of view, it is redundant and time consuming to build multiple boxes of different heights attached altogether as one pencil holder.
A way to get around this is to build one large box with partitions and cut the box across diagonally to create multi-level partitions. You can even produce two symmetrical pencil holder out of one large box. And that is what is project is all about.