Nice looking device. You couldn’t use that as is though. However, I do not believe there would be any way to sanitize the wood body. The body needs to be made of plastic.
It’s fast, easy and cheap to prototype cases using that notched plywood.
You are right, of course, that it cannot be sanitized or disinfected. Good point.
The developers spent their time on the core product proving it works. Once the innards and their configuration are finalized, they can package it up in a nice 3D printed shell case.