Tire stack pen holder

Remixed to make it stronger, improve layers and smooth the inside.

To make it look more realistic, the tires are not precisely centred on top of each other.

The model is easily 3D printable without supports.

Plate 1 is for 1xholder and plate 2 is for 6xholders (max for a1 mini)

Design by Josh on MakerWorld (license: BY-SA).