Mainstays 8-Piece Plastic Pantry Food Storage Container Set, Kitchen Pantry Organizer Canisters for Dry Food Storage and Pantry Organization

I got a set of these canisters—you can probably find something similar elsewhere. They're cheap and they do the trick. I use one for citric acid, one for BIZ, and one for FEBU. I keep a measuring spoon inside the canister.