I model this cylinder box for my wife's makeup brushes and she founded very useful and decided to upload it, maybe someone ell will find a use for it. 

You can fit plenty of brushes in it even some big ones, when closing the lid make sure it doesn't pinch the hairs of the brush.

I added an O-ring because without it the lid won't close properly (it will be a little loose) glue the O-ring to the bottom piece.