Preparing formula

Preparing infant formula correctly is important to ensure your baby gets the right nutrition and is safe from any potential health risks. Here’s a step-by-step guide based on recommended practices in New Zealand:

1. Wash Your Hands

Before preparing the formula, wash your hands thoroughly with soap and water. Clean and disinfect the preparation area.

2. Sterilise Bottles and Equipment

Sterilise bottles, teats, and any other feeding equipment by boiling them in water for at least 5 minutes or using a steriliser. Let them air dry on a clean surface.

3. Boil Fresh Water

From birth to at least 6 months, always use freshly boiled and cooled water for preparing infant formula:

Boil Water:

  • Use a full jug or kettle and let it boil until it switches off or whistles.
  • For a pot, boil the water for 1 minute.

Cool Water:

  • Pour boiled water into sterilised bottles.
  • Cover and let it cool to room temperature (no longer warm to touch).

Store Safely:

  • Keep cooled water out of direct sunlight and use it within 24 hours. Discard any unused water after that.

4. Measure the Formula and Water

Follow the instructions on the formula tin to measure the right amount of water and powder. Use the scoop provided in the tin, leveling it off but avoid compacting the formula. Adding too much or too little formula impacts the nutritional content and may harm your baby.

5. Mix the Formula

Pour the boiled, cooled water into the sterilised bottle. Add the correct amount of formula powder. Place the teat and lid on the bottle and shake well to mix the formula until it is completely dissolved.

6. Test temperature

Test the temperature by dripping a few drops of formula on the inside of your wrist. It should feel lukewarm, not hot. If you need to cool it down, cool the bottle under running cold water or place it in a container of cold water. Shake the bottle occasionally to help it cool faster.

7. Feed Your Baby

Once the formula is at the right temperature, feed your baby immediately. 

8. Store Any Leftovers

Discard any formula left in the bottle after feeding or within an hour of being made (whichever comes first). Bacteria can grow in leftover formula, making it unsafe for later use.

Important Tips

  • Always check the expiration date on the formula tin before use.
  • Use formula powder within 1 month of opening.
  • Follow the instructions on the formula packaging carefully, as different brands may have different mixing instructions.
  • Never add extra water or powder to the formula mix. 

By following these steps, you can ensure your baby's formula is safe, nutritious, and prepared correctly. If you have any questions or concerns, consult with a healthcare professional.

For quick reference download our formula preparation chart here