I lost the cover that comes with a new harrys razor and attempted to make my own. It has some wiggle room once inside but stays closed well. So well that it can be difficult to open, so I just pry my fingernail under one of the snap tabs and pull up, being careful of the blades on the razor. To put it back on I just set the razor in one side on a flat surface and line the other piece up and push down until I get it. Feel free to make a remix and improvements, I just made this quickly before a vacation!
The author marked this model as their own original creation.