Do not use glass jars for storage

[upnick]

That's true, I save most every kind of plastic jar for just that. But, just a word from someone that's been there, when it comes to paint, make sure what kind of paint and the type of plastic jar you are using. Years ago I had some paint that I mixed the color and wanted to save what was left so I put it in a plastic jar. It took just a day or so, but when I looked at it again, the paint had melted the jar and was dripping all over the place. Some plastics are impervious to solvent-based paint, the one I used wasn't. I use acrylics mostly now, and that's not any problem with plastic, but sometimes I use lacquer, and that goes back into glass or metal cans even if I do have a tough time getting the lids off.

In the case of solvents that have to go into glass jars ezdays if the top wont budge hold it upside down in warm water it breaks the seal on the jar making it easier to open.