So I got one of these for Christmas and after using it for a little bit I have to admit its one of my favorite hobby 'tools' I have ever had.
https://www.amazon.com/Winsor-Newton-Silicoil-Brush-Cleaning/dp/B0027ACEI2I guess you can make your own, but its pretty inexpensive. The best part is something I never thought about doing, and thats having a lid on my water pot. So after I clean it out, I refill it, cap it, then its ready for the next time I paint. I can't tell you how many times I would leave my water pot to dry out and then have to clean it out and refill it before starting.
The coil is pretty great too. You can run your brush through it to really squeeze out the paint.
Maybe these have been around for a while I don't know, but I think they are great.