Thumbs up to this idea! Why didn't I think of that?
I discovered this little bit of genius when I was subbing in my old art room a while back. I snapped these pics to share with you, and then promptly forgot about them. I rediscovered them tonight while scrolling through my phone to delete extra photos.
I personally always hated paint pumps, because, of course, they always clogged. So I didn't use them. I poured paint instead, and honestly, I guess I have a pretty steady hand. But this solution is simple, and absolute GENIUS! These thumbs are simply pencil toppers. They fit perfectly over the paint pump spouts, and totally keep them from clogging.
Sometimes the simplest ideas are the best. Now I just have to figure out where to find these cute pencil toppers!