3D Printed Nano Geocache Container (40mm × 20mm)

After seeing the tiny nano geocaches commonly sold online, I decided to challenge myself and design a fully 3D printable version from scratch.

What initially looked simple turned out to be much more difficult than expected. Because of the model’s very small size, I had to carefully balance wall thickness, strength, and printability. If the walls were too thin, the print would fail or become fragile. If they were too thick, the model would lose the compact proportions of a real nano cache.

I went through multiple prototypes and test prints to find the correct dimensions and support structure. Different support configurations were tested to make sure the model could print cleanly while still keeping fine details and maintaining durability.

The final model measures approximately 40mm × 20mm and is optimized for reliable FDM printing while preserving the appearance and feel of a traditional nano geocache.

One of the goals during development was efficiency. The final version uses only around 2g of filament and takes approximately 20-25 minutes to print, making it quick, lightweight, and practical for producing multiple copies.

This model is designed for geocaching enthusiasts, collectors, and anyone looking for a compact printable cache container. The design focuses on:

• Small-scale printability
• Structural durability
• Clean support removal
• Accurate proportions
• Efficient material usage
• Fast print times

Recommended:

• Fine layer heights for best detail
• Proper cooling for cleaner overhangs
• Careful support removal for best results

An assembly/usage guide will be added later, even though the model itself is very straightforward and requires no real assembly.

This project was a fun engineering challenge and took several iterations before reaching a final printable design.