Magnetic Paint Brush Holder
This simple paintbrush holder incorporates two magnets into a bent plastic clip. Clip the holder to the side of the can and it'll hold any brush with a ferrous ferrule in a vertical or angled position. As a bonus, a metal tab for opening paint cans is built into the lower grip.
Professional painters and finishers will probably cringe seeing the above picture of a paintbrush dripping back into the can, but who says you have to use this handy little magnetic brush clip on the original paint can? Clip it to the side of your roller tray or favorite paint pail instead.