This is a stand for the G3061 PD65W heat plate (the white thing in the middle) for using it with the Cafelat Robot. It securely holds the heat plate under the piston and has a opening on the bottom to store the heat plate when not in use.
For more information about the why you might want this, you can read my blog post about it.
Printing notes:
Make sure to print with supports for the open bottom. Tree-style/organic supports worked well for me (see picture).
The author marked this model as their own original creation.