Collar Stay
You know what I hate? When I am out of collar stays. Why wait for Amazon to deliver another box of them to you when you can have a pair in about 8 minutes? (I have an Ender 3 v2 Neo).
Take this model and add 2 copies to your slicer and print them out at the same time. They are only .8mm thick so that's just 4 passes at .2 mm thickness.
Do you have more time? Do what I did and add 30 copies to your slicer and print out 15 pairs. Heck, I did this twice so now I have 30 pairs of collar stays in my dresser right now.
What a time to be alive.