ID Card Protector Holder

One can slide in up to two cards ( one ID-card and one RFID-card for example) and they are easily slide out again by pushing down the latches with your finger. 

Just print it upright in the given orientation, no support needed. Use of PETG is recommended in order to make the case a little more robust against sitting on it and breaking it in two. Had never a problem with my PLA one, but better save than sorry i guess.

if you sling a strap trough the latch(es), you can hang the case around your neck or attach it to your jacket or other gear.

Credit where credit is due: I realy got inspired by this design and tried my own attempt on one