What do you put in that third canister?

Canisters usually come in sets of three. Flour and sugar are obvious for the largest two, but what do you put in the third one?

There is a set I want because of the kind of top they have, but I realized earlier today that they won’t look right because they are clear and I always put things like a bag of brown sugar (in the bag) or packs of sweetener in there.