This Pen Holder is made from the triply periodic minimal surface called Schwarz D.
This surface family was described by Hermann Schwarz in the 1880s and the “D” stands for “Diamond”.
Triply peridodic minimal surfaces use as little material as possible to span a given space – just like soap bubbles do.
naturally that saves filament as well!
You can store up to 14 pens in two diagonal directions or you can chose to orient them all to one side.
Credits:
Alex and Tonic 3D