Just a box really :)

This model when printed in PLA warps quite and tends to come off the bed at the corners a bit if printed without a brim. I suggest using a minimum brim of 10 lines.

I even printed a 20 x 20 cm version and apart from the serious warping on the corners it works great! a bit expensive on filament though!

25% infill is best i think, as it connects with the walls well.