I needed a box to safely storage and transport my 20x20cm origami paper.
This box fits maximum volume of a Mk3S. DON'T fit on a prusa Mini.
To be able to print this big on a Mk3S, i had to make a magnetic lid. But maybe a sliding one could work too.

For assembly only need 8x 4mm magnets. I get my magnets from cheap broken headphones.
To assembly just put the magnets into the holes and tape or glue them.

Be careful with the polarity, so them don't repel each other.