1. Place milk in glass milk bottles or canning jars. Fill only four-fifths full to allow for expansion of milk when heated.
2. Place the bottles or jars on a rack inside a large canner. Fill the canner with warm water
until the water level is slightly above the milk level in the jars.
3. Start heating. Stir the milk in each container with a long-handled spoon to achieve uniform distribution of the heat. Monitor the temperature with an accurate, metal-stem thermometer. As the temperature approaches 145 degrees F, stop stirring, and loosely cover all jars but one with lids. (Milk bottles can be covered with aluminum foil.) Cover the
remaining jar with aluminum foil. Punch a hole in the center of the foil and insert the
4. Continue heating until the temperature is 145 degrees F or slightly above. Adjust the heat
to maintain the temperature at 145 degrees F for 30 minutes. If at any time the temperature
drops below 145 degrees F, reheat and hold at 145 degrees F or above for 30 minutes.
5. After 30 minutes, gradually replace the hot water with cold water to cool the milk. If this is not done gradually, the bottles or jars may break.
6. Continue cooling until the milk temperature is 80 degrees F or less. At this temperature, ice water can be used for cooling. Cool milk to 40 degrees F or colder. Tighten the covers and store in the refrigerator at 40 degrees F or colder until used.
Always wash all utensils that you will use to express and heat treat your breast milk with clean water and soap. It is best to boil these utensils after washing to make sure that they are clean.
Put all the milk you have expressed in a heat resistant glass (not plastic) jar. The amount of milk should be between 50 ml and 150 ml. If you have more milk, you may divide it into 2 jars.
Place the jar of milk in a small pan of water. Make sure the water is about two fingers above the level of milk so that all the milk will be heated well.
Heat the water on a very hot fire or on the highest levelof your stove until it reaches a rolling boil (when the water has large bubbles). Stay close by because this should only take a few minutes. Leaving the water to boil too long will damage some of the nutrients in the milk.
Remove the jar of milk from the boiling water immediately after the water comes to a boil. Place the jar in a container of cool water, or let it stand alone to cool until it reaches room temperature.
Protect the milk as it cools and during storage by placing a clean lid or small plate on it.
You can safely feed your baby this heated milk within 6 hours.
Always feed the baby using a clean open cup. Even a newborn baby learns quickly how to drink from a cup. Avoid using bottles and nipples. They are difficult to clean and may make your baby sick.