I made these so we could prevent eye injuries working in the garden around the hard-to-see green garden stakes. They also make the stakes easier to push into the ground, and can be used to support netting without puncturing. I was able to run off 20 of these in about 4.5 hours.

The model is optimized to print at .45mm line width and .28mm layer height. 

Simple print with rounded overhangs. Should print well without any support. I recommend a bright colored PETG, ASA, or ABS since it will be exposed to UV being outside. I have only printed them with PETG. Depending on how well tuned your printer is they may need to be scaled down a slight bit. This is the first model I've uploaded so I'd love to see some makes if you print some. Let me know if there's a need for additional sizes. Thanks!