Organizer thingy for blackboard chalk or anything else cylindrical

**Note**: This is thing is not maintained on here any more, further development/support it will happen on its [Youmagine page](https://www.youmagine.com/designs/organizer-thingy-for-blackboard-chalk-or-anything-else-cylindrical).
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My mother (who's a teacher) keeps her personal stash of blackboard chalk in a small container. In the past she had the problem that the chalk could freely rotate and fall around in that container, which led to some broken pieces and a lot of chalk dust. When I