This is a microphone holder designed to go between the car lining and/or dashboard panels. The microphone has a 7mm ball, the socket is designed to be a snap fit.

Design

OnShape link: https://cad.onshape.com/documents/43898adf698774fc6db6e3da/w/b59baac7184bcfffa9cc0222/e/f69d27b87bd2e2b3483b25b1
The insert/stalk has a 1mm thickness which should be enough for holding a few grams, while also fitting between most panels.

Printing

Printed in PETG, 25% infill, 0.2mm layer height, supports and rafts enabled. Should print even better in PLA.
I've designed it to be printed with the cup facing upwards, with no support, but felt safer with supports turned on. It could also be printed upside-down (with supports) but removing them could be challenging.