The is an open bottom enclosure. A snap bottom could be made. Since the USB cable sticks out past the enclosure it could be extended to allow for flush sitting while plugged into usb.
The author remixed this model.

This change makes this enclosure a desktop version. It has a button for button0/boot and an opening for the power switch. It sits at an angle. The USB cable doesn't quite fit at this angle but a 90 deg flat adapter should work. Can solder power directly to allow for flush sitting on the desk.