Expandable pencil organizer,
with flap suitable for ring binders (80mm), or without as a normal box.
Add 8x3mm magnets to the side to combine multiple boxes.
Print with 0.25mm layer hight. No supports needed.
MINI
Rotate the parts 45° to fit on the print bed.
Adjust the "Fill Angle" to 90° (see pictures)
The author hasn't provided the model origin yet.