I decided I needed another cupholder on the pegboard above my workbench - the other one works great with beer bottles and cans, but I needed something to hold my Yeti 20oz cup as well as the larger coffee cups I use. So this has a 3.75" interior, is 3" deep and has a slot for the cup handle. I've created some updated pins to mount it to the pegboard from the ones from my other designs - I also gave it 6 pin openings so it stays nice and snug on the pegboard. You will need 2 of the pins with the shorter heads for the center holes and 4 of the pins with the thicker heads for the four outer holes.
I did it at 0.3mm, doesn't really need more