Stackable tube used as a fishing rod case, in my case. Should scale reasonably well. The .3mF file is optimized for rapid PETG, I've used the Elagoo black and grey. Any PETG should work but you may want to slow things down if it's not PETG-HF/rapid. 

Set includes 200mm and 50mm height segments, a 50mm tall cap, and a 50mm tall segment with hooks and threading on one end only.