Isomax Cell

Isomax cell as covered in variety of news outlets. Even though it's not exactly the actual product they'll be selling some day (or being a metamaterial :D), the geometry itself is tough as nails even with pla at larger sizes.

Printed with 40mm/s, 120mm/s travel speed, no infill, no supports and upscaled to 750%.
Worked well in Cura.

Includes the .obj file as well in case you're getting questionable prints which might be due to one of the triangles not having inner faces (worked fine for me) or if you want to actually make something with it.