TLG has produced a number of sets which come in reusable plastic boxes. I'm curious to know which of these are able to be easily stored together. Primarily, I'm wondering which boxes can be stacked, but if there are any that are compatible in other ways, that would be interesting, too.
As an example, these two boxes can be stacked on top of one another:
There are other variations, even in production currently, which aren't compatible with this style. For example:
I'd like to know which boxes are compatible with others.