Raspberry Pi Zero case thats designed to work with the DAC from RaspiAudio, model Audio+V3. The manufacturers product page can be found here:

https://raspiaudio.com/product/audiov3/

I printed in both PLA and PETG. Either should work fine. I used 25% honeycomb infill for the vent with zero top/bottom layers.

10mm m3 screws are used to close it up.