This case is composed 6 pieces of clear acrylic sheets, and can hold your Witty Pi (or Witty Pi 2) and Raspberry Pi (B+, 2B, 3B or 3B+) together. The acrylic sheets are 3mm thick and the case can protect your Witty Pi + Raspberry Pi very well.
The top cover can be opened so you can setup the jumpers or replace the battery. There is also a window for GPIO header, so you can still access all GPIO pins.
Here is an instruction for assembly the acrylic case: http://www.uugear.com/portfolio/assembly-guide-acrylic-case-for-witty-pi-raspberry-pi/
This case can fit both Witty Pi and Witty Pi 2.