Another option to consider for your working solutions of dev, stop, etc. Empty plastic peanut butter jars. I have a set for 35mm marked for both 10 and 20 ounces for doing either one or two reels. Each is permanently marked for its particular chemical. After filling, if you need to temper the chemicals, the screw-on lid is handy for sloshing them a bit to raise or lower the temp. without fear of spillage.