I use a lot of "Sterlite" containers. They're available in most any general store, fairly cheap. 1, 2, 4 & higher gallon sizes.
Example Sterlite containers
Polypropylene (PP), Polycarbonate (PC), Polyethylene (HDPE) are all suitable plastics. Polypropylene is best in terms of chemical resistance & neutrality, but isn't recommended for real high temperatures. The Sterlite boxes are PP.
Sean