My precision dial indicator (STEINLE 3105) came with a calibration certificate but unfortunately without a storage box. This tool is a little bit to expensive to have flying around in a toolbox unprotected. Therefore I printed this box, which has two layers of protection. Of course the outer box itself against banging onto other tool and getting scratches or bend, additionally the dial is bedded in 50% density PLA foam for shock absorption. The lid also has foam on it.

Case Material: What ever PLA you have.
Insert Maertial: Foaming PLA or Foaming TPU

Here is the link to the onshape model.