It was a request from my wife,
She wanted to be able to have her menstrual cup in her handbag "safely".
I design an ajusted box for the cup using the cup model from here :
Using that model i design under solidworks the attached box.
My first print (in photo) was very ok except a small mistake on the "screw" part.
It is fix in the uploaded file.
It does fit a 30cc cup as the one in the link.
It should fit properly with an appropriate tolerance.
Add a small oil drop (oliva for example) or lube in order to make it move smoothly.