When you have a lot to paint, but even if changing the color — cast under the cans the paint will not save enough. Meanwhile, you can do one enough to insert it into a plastic bag and secure with a rubber band.

This is good because the dye packs are easy to change, and if you tie the neck — the paint will last long, will not wither.
Recommend to read
ELECTRIC VEHICLE “PROTON”
The late XIX and early XX centuries - the first self-propelled carriages, steam engines and internal combustion (well, come on) electric! Incidentally, the first threshold speed in a...
“LIVING” WATER AND “DEAD”
"I know, I know— says a reader, after reading the title.— Yes, but neither "alive" nor "dead" water does not happen. Tales!.." Is he right? A few years ago, the magazine "Inventor and...