I designed this puck to hold a microphone circuit LED indicator. It was printed with clear PLA filament to let the light through, but wall is strong.
The top can be printed upside, look like a short cup, without a need for brim or support.
The screws for securing both parts: Hillman 127007 stainless pan Phillips Sheet Metal 8 x 3/8". It's available from Lowes for $2: https://www.lowes.com/pd/Hillman-12-Count-8-x-0-38-in-Stainless-Steel-Interior-Exterior-Sheet-Metal-Screws/3818041
This generic design can also be used for other purposes.
The accompanied *.3mf files can be edited in Microsoft 3D Builder, which comes with Windows 10.