Warming breastmilk or formula

Warming Expressed Breastmilk
The safest method to warm breastmilk is by placing the container in a bowl of warm water. Always use fresh breastmilk first if you have it on hand. For frozen breastmilk, thaw it by placing the container in cool or warm water until it’s ready.

After warming, gently swirl the bottle to mix the milk, and check the temperature to ensure it’s lukewarm or around body temperature before feeding your baby. 

Warming Infant Formula
Most babies prefer their formula warmed to at least room temperature, although some are happy with it cold. To warm formula safely, stand the bottle in a bowl of warm water or use a bottle warmer with a thermostat control. Make sure not to leave the bottle in the warmer for more than 10 minutes, as harmful bacteria can grow in prepared formula.

After warming, swirl the bottle gently to mix the formula and test the temperature by placing a few drops on your wrist. It should feel just warm. If the milk is too hot, cool it down by running it under cold water or placing it in a bowl of cold water.

Avoid using microwaves for warming or thawing baby's milk, as microwaving can damage some of the beneficial components, cause uneven heating, and risk burning your baby's mouth.