Printed here in Overture PET-G on a Bambu X1C. 0.16 layer height 2 walls, snug support for cross and finger groove only. Files are for Prusa Mk4S. .3MF file was generated using the Bambu slicer and should fork for anything.
Photo shows source 9CM box on left, the 65x107x23 First Aid box in on the right
The author remixed this model.
Increased size to accommodate bandages and other small first Aid items. Added cross and finger grip for easier opening