Formulas are made from a base of skim milk, powdered cow's milk, or a vegetable protein, such as soy. Most formulas are nutritionally very similar, but you should ask which type your health care provider recommends.
- Ready To Feed Formula needs no preparation. This is the most expensive type of formula. Be sure to wash the top of the can and the can opener before each use.
- Concentrated formula must be mixed with an equal part of water. You may be able to mix the formula with tap water or you may prefer to use bottled or boiled water depending on where you live and your health care provider's recommendations.
For example: mix three ounces of water with three ounces of concentrated formula to make six ounces of ready-to-feed formula.
(3 oz. water + 3 oz. concentrated formula = 6 oz. ready-to-feed formula).
Carefully follow the instructions on the formula label. Too much or too little water to the formula may not provide proper nutrition which may have a dangerous effect on your baby's kidneys.
- Powdered formula must be mixed with water. Follow instructions on the container regarding the amount of powder and water. This is the least expensive type of formula.
How Long Can Formula Be Refrigerated?
Once a can of formula is opened, store it in the refrigerator and use it within 48 hours. If you take formula with you, bring a cooler to keep the formula cold and discard any formula the baby does not finish.