Anti-cat door handle stop.

Our cat figure out how to open all of the doors because of this door handle style (he comes into our bed room in the morning to ask for food, enters human bath room and leaves poop on the floor mat, etc. etc.)

The battle between mankind and feline species lasted for many years until I invented the crude, but effective door handle stop, made out of three Jenga pieces, but there was one issue: it was ugly!

Now, with 3D printer, we put the end permanently to this battle.

Victory!!