Report Shaking Bottles of Paint in Tips & Advice: Painting Posted April 23, 2015 Thanks for all the great suggestions. I think the Vortex sounds like exactly what I'm looking for -- and you're right, Qwyksilver, there are quite a few on eBay for reasonable prices. The 8-at-a-time method appeals to me mainly because painting is something of a boom-and-bust activity for me. I'll have the time to do all kinds of painting for a while, then months might pass before I can get to it again. Having to spend the first 40 minutes of a session picking out my colors and shaking them is a drag! Thanks again!