I got a pack of 10 colourful fine-liners recently and didn't find any existing models for this specific pen brand, so decided to measure them and throw something together in a form of a circle and at an angle similar to what's been done for some others. Quite a simple / basic design but I think it works well enough.
Inner part was left empty and could fit some kind of a cup or storage container of sorts in the future.
Print with whatever settings you'd like, no supports needed anywhere.
The author marked this model as their own original creation.