I do the same thing but I use larger jars to make it easier to dip the brush in. Wide mouth half pint canning jars are good.

I was gonna say Canning-Jars too...

The rubber seal on the separate lid is perfect for keeping air out. Tighten-down the ring well, as you would for food.

Also-
The less air-space, the better. Old ping-ping balls can take up some space if ya got some!

Faron

Ping pong balls in the paint can? What do you do with them when you want to use the paint? Sounds messy.

Put 'em in a bowl and call them decorative accessories well-coordinated to the room. :)

"Put 'em in a bowl and call them decorative accessories well-coordinated to the room. :)"

Now that his funny! Seriously, they would probably make better decorative accessories than most of the stuff at [insert the name of your favorite tacky decorative accessories store here] and a lot less expensive.

I do the reverse - put the well-mixed leftover paint into ziplock freezer bags, press out almost all the air and seal it.

LABEL THE BAGS!

Then I store the baggies of paint in the original can. If I need touchup paint, I take out one small baggie.