My take on a silica gel container using honeycomb infill for the top and bottom of the model to get a nice grid of holes.
I've included files for the large (180x100x25mm) and small (60x60x15mm) box.
Was inspired by https://www.prusaprinters.org/prints/3253-silica-holder
Important if you need to re-slice the model, the honeycomb pattern is produced in PrusaSlicer by using the following settings:
Model uses thin walls that are the correct size for 0.3mm layer height to avoid any gap-fill.
The FreeCAD model is parametric. If you open it with FreeCAD (I used v0.18.4) then you can edit the Params spreadsheet to change the size of the box. Then, select the box and lid and export them as STLs.
The author hasn't provided the model origin yet.