Just picked these up at my A.C. Moore (It's an arts and crafts store).
It's useful to store solvents in to squirt into the cup of gravity fed airbrushes. Heck, if you're spraying the body, storing the paint in one of these wouldn't be a bad idea(make sure you pre-thin it though). You can even store lacquer thinner in them, since they are made of low-density polyethylene which doesn't react to the solvents in lacquer thinner.
I found them in the candy confectioner's section of my A.C. Moore, don't know if it varies by store. Two bottles for $1.88
