I made this for a friend that has a lot of these paint markers. It was made specifically for that brand (you can see them in the images) but we tested it with a few others she has and they all fit just as good. I would print the top piece upside down just the reduce any chance of droop since the arms of the bottom slide into the holes for the top. I plan on continuing to update this to reduce waste and decrease print time.
The author marked this model as their own original creation.