This is carry case for 6x Nintendo Switch game cartridges in a shape of a Yoshi Egg.
It's a stylish compact design for 6 cartridges. A piece of the 1.75mm filament is required to act as hindge axle. The case has a snap lock mechanism designed in. When printed properly the case will snap shut firmly when closed.
I have published this on Thingiverse. This model has been adapted to utilise AMS to print the colour spots on the egg automatically.