Paint brush cleaner

I really needed something in my brush washing cup to help me clean my brush. So why not design one myself. This is heavily influenced by the Paint Puck®  Original Paint Brush Cleaner. Ordering these to Germany is expensive and as we all love to print our own tools, I adapted it to be used with a suction cup I had lying around from my aquarium. These are the Eheim 7292500, cost around 5,90€/4pcs in every pet store. They are strong and hold the cleaner down in your cup. 
Edit: You can also put a magnet in the middle and one under the cup if you don't like the suction cup. Thanks for suggesting this in the comments!
I use it in my Faber-Castell CLIC & GO Water Cup, but it fits a wide rage of cups. The outer diameter is 60mm.

I printed mine a few month a go and it works beautifully. Just print your own and give it a try!

Print suggestions:
material is not critical
0.2mm layer hight