I've got various UPS battery backup devices, power strips, etc. They all sit there with the sockets facing up where dust can accumulate and possibly cause problems when you plug in something new. The commercial child safety plug covers are not only difficult to remove (intentionally so), but they are huge, and overlap when you try to plug them into adjacent sockets. This model is absolutely NOT a child safety plug. All it does is keep dust out of the socket, and it is as small as possible to fit in adjacent sockets. There is a handle to make it easy to remove and the prongs are short so they aren't difficult to pull out.
The second photo is of the lifetime supply I printed on my MK4 by using the “fill print bed” option in Prusa Slicer :-).
The author marked this model as their own original creation.