This is a custom holder for these Cuisinart 12 cup accessories:
Each compartment features a drainage hole just in case the part isn't fully dry. There are two centreline screw mounts sized for a #6 wood screw, 50 mm apart vertically. Thanks to the flat bottom, it's also a great piece of countertop art.
The design is somewhat parameterized in OpenSCAD. Message me if you'd like a version with different dimensions (only two blade slots, though).
The author marked this model as their own original creation.