Summary:

Simple holder for standard cards, like ID's and member cards.

Printing:

I printed the bottom part in BambuLab PLA-CF on a textured PEI plate to get the cool texture and smooth surface. The lid was printed in transparent ABS. In addition, the lid has two small elevations which then press the card against the bottom part and you won't lose it.

Assembly:

After printing both parts glue them together and you're good to go :)