Powdered formula would be the least expensive form of infant formula to stock. Amounts needed would vary, depending on the age of the infant. Infant formula has expiration dates on the packages and should not be used past the expiration date. Parents should also plan to have a variety of infant cereals and baby foods on hand. Amounts needed will vary depending on the age of the infant.
Canned meats are a good selection.
Rice and varieties of beans are nutritious and long-lasting. Packaged convenience mixes that only need water and require short cooking times are good options because they are easy to prepare. The more of these products you include, the more expensive your stockpile will be. Buy a supply of the bulk staples listed previously. Rotate it periodically to maintain a supply of common foods that will not require special preparation, water or cooking.