You can't fill those Pilot's w/paint. There is no valve thus the paint just comes out if it is put upside down. Trust me, I put a little too much red Pilot ink in one, one day and welp, let's just say, ruined jeans, ruined carpet in friends house, and ruined zip loc back and a lot of paper towles. See the trick is the performance fabric filling keeps it all together and no mess. If you want drips...Don't use a Pilot.