I used some old CDs to construct my case. I attached rubber feet to the bottom CD and I’m using hex standoffs removed from a VGA port to mount the Pi. I used an old brake line from a 78 Mustang to make spacers to mount the top CD an inch above the Pi. With this open design there are no heat dissipation worries, all ports are easily accessible with no ESD concerns and the LEDs reflect very nicely off the CD surface. I also mounted the Pi to provide easy access to insert/remove the SD card.
I didn’t like the micro-USB port and I had a few 5v supplies with the barrel type plug so I mounted an old jack I removed from a headset amplifier to the bottom CD to supply power via GPIO and added an on-off switch removed from a set of Labtec speakers to the hole on the top CD.
I also mounted an rj11 jack to the bottom CD and wired it to GPIO where I am running a standard phone cable connected to an IR receiver(using this to send remote codes that CEC wont pass through). I also added the Raspberry logo pattern behind the clear portion of the top CD to give it an authentic look.
Since I used recycled parts the total cost to build the case was $0 and these old CDs will not end up in a landfill for 1000 years. I see some elaborate case designs and wanted to present something simple and provide a unique look that was attractive and functional.