This is a simple parametric box. I don't know of any filament that would cause any problems; maybe TPU would go badly? I would use a stiff filament like PLA as the hinge.

There are two inserts. One is a generic blank that fills the box to create a custom insert. There is another that is a simple cushion, that I would print with TPU and low infill.

If you want a 4x3x1 box use the provided files otherwise use the onShape link and define your own size.

To change the sizes look at the top right corner to change the values. They are all in centimeters, and length must be in whole numbers.

To export I would suggest right clicking on the parts you want in the sidebar and press export. You can also right click on the Full tab and press export but it will export everything as separate parts including the hinges and latch or as one solid model.