Formula Preparation

Hold "Ctrl" and Press "F" to search for keywords on this page.

Powdered infant formulas are NOT sterile. Proper hygiene, sterilization, dilution, and storage are important when preparing bottles of infant formula.

How to Prepare a Bottle of Infant Formula from Powder

  1. Wash hands and clean bottles, nipples, and all utensils in hot, soapy water. Use clean brushes to scrub inside and outside of bottles and nipples. Rinse thoroughly with hot water.
  2. Sterilize by placing bottles, nipples, and utensils in a pan of water and bring to a boil. Make sure all items are completely covered with water. Boil for 5 minutes. (A dishwasher may be used to sterilize in place of boiling water.) Air dry completely on drying rack not with a towel. You do not need to sterilize bottles, nipples, and utensils before each use unless there is a concern for contamination. 
  3. Place the water that is to be mixed with formula into a pan and bring to a rolling boil.  Boil 1-2 minutes. Remove the water from the heat and let it cool to room temperature (75ºF) or below. 
  4. Wash the top of the formula can before opening. Mix formula according to the manufacturer’s instructions on the container. Use one can of formula before opening another. 
  5. Put a clean, sterilized nipple and cover on the bottle (with nipple facing into the bottle) and shake gently until contents are well-mixed.  Place a cap on nipple if not using immediately and refrigerate. Do not leave at room temperature and do not freeze formula. Use within 24 hours.
  6. Before offering your baby the formula, test the temperature! To cool, hold the bottle under warm running tap water or place in a container of warm water. Formula should not be heated in the microwave because it can cause hot spots that may burn baby. Too hot, allow time to cool or place under cool running water.
  7. After feeding, throw out any leftover formula in the bottle or any formula that has been at room temperature for 1 hour or more. Why? Bacteria from the baby’s mouth goes into the bottle and will grow and multiply if kept longer than 1 hour after feeding.  If you are worried about losing formula, mix small quantities and add if needed.

How to Prepare a Bottle of Liquid Formula

  1. Wash hands and clean bottles, nipples, and all utensils in hot, soapy water. Use clean brushes to scrub inside and outside of bottles and nipples. Rinse thoroughly with hot water.
  2. Sterilize by placing bottles, nipples, and utensils in a pan of water and bring to a boil. Make sure all items are completely covered with water. Boil for 5 minutes. (A dishwasher may be used to sterilize in place of boiling water.) Air dry completely on drying rack not with a towel. You do not need to sterilize bottles, nipples, and utensils before each use unless there is a concern for contamination.
  3. Place desired amount of liquid formula in the bottle. Do not add any water or additional powdered formula. 
  4. Before offering your baby the formula, test the temperature!  To cool, hold the bottle under warm running tap water or place in a container of warm water. Formula should not be heated in the microwave because it can cause hot spots that may burn baby. Too hot, allow time to cool or place under cool running water.
  5. After feeding, throw out any leftover formula in the bottle or any formula that has been at room temperature for 1 hour or more.
  6. An opened can of liquid formula is safe to up to 48 hours when tightly covered and refrigerated.

This post was last updated on July 9th, 2020 at 3:53 PM

This institution is an equal opportunity provider.