I start by using chihuahua sized double-dish dog dishes, one on each side of the brooding area. One dish ahs grit, two dishes have chick ration, and the other dish has the new food or treat of the day.
As they grow I move up to the next size dog dish. At about 4 weeks I'm using a multi quart bpa free food container.
My adult ducks are eating out of a flexi rubber 4 quart hog pan. But I'm thinking of switching them to bucket feeders with rain covers by next winter. Kind of sucks clearing snow out of the food bowl when its too cold to move your hands :).