Child proofing cover for type F outlet

My own spin on a child proofing cover for type F outlets. Allows for easy one-handed removal just by using the power plug itself. Requires less than 10g of filament per piece.

I found it to be the easiest if the holes are facing up. 

Might require a few tries at first, but once you go it down it's a very easy and fluid movement.

Edit, added v2: I added a little indentation as an indicator where the holes are facing up.

Here is how it works in action: