Parametric model (Onshape) to create simple rectangular and circular storage trays, typically for small parts.  

A few examples are included, but the real opportunity with this model is to design your own using the parametric functionality of the model.

One option is to have several smaller trays nested within a larger tray.  For example, having several different but similar parts all organized together.

Here's the link to the Onshape version:  

https://cad.onshape.com/documents/7fcfad0e916ba12a36eb5cf6/w/6d0b478fbceea75b4031e7fc/e/b3c32f549597cbcce9bf55f4