The Glühwein is a custom mechanical keyboard meant to be simple, portable and cheap.

It uses a 40% layout and Kailh choc switches to be as small and portable as possible.
It is supposed to be used with a bluetooth connection, but it depends on the controller used.

To keep it simple, it doesn't have any "additional features" like lights, alternative layouts, encoders etc...

The PCB is self produced in some sites like JLCPCB; since it is only possible to order a quantity multiple of 5, a PCB can be used as base to create a sandwitch case.
The sides can be laser cut or 3d-printed.