This is a very simple case for the Raspberry Pi Zero and Zero 2 with headers, of course models without headers will fit, too. The two halves snap together and provide a snug fit while keeping all ports and the GPIO pins accessible.

Tested with Bambu Lab PLA Matte and the Raspberry Pi Zero 2 WH on a Bambu Lab P1S. Should also fit all non-header models and the original Raspberry Pi Zero as well.

Printed with 16mm layer, 2 wall loops and no supports.