Can You Reheat Formula?

Written by Renee    Published on 04/09/24     Read Time 5 min

Bottle with Pacifier | My Organic Company

Parents often wonder if it is safe to reheat formula. Understandably, we want to save every drop of it. However, the critical question is whether it can be reheated safely without risk of bacterial contamination. 

This article will discuss the guidelines for safely reheating formula so your baby can consume it without any health concerns.

Mom testing Bottle temperature | My Organic Company

What If My Baby Falls Asleep?

If your baby falls asleep before finishing their formula, you might need clarification about what to do with the remaining liquid. In such a situation, it is safe to refrigerate the bottle. This will keep the formula fresh and free from harmful bacteria, even if your little one does not finish it immediately.

Following the refrigeration guidelines of your baby's preferred formula manufacturer is essential. This will help ensure that the formula stays fresh and safe for consumption.

Baby Sleeping | My Organic Company

How Do I Warm Up My Baby Bottle?

Let's start by saying that if your baby doesn't mind, you don't have to reheat prepared baby formula after taking it out of the refrigerator. Your baby can drink cold formula

If your little one prefers warm formula, don't worry! There are several safe ways to ensure it's at the perfect temperature for them.

A Bottle Warmer

This hands-free method involves placing a bottle of formula into a baby bottle warmer and waiting for it to reach an appropriate temperature. Following the warming instructions carefully is essential to ensure safety and nutritional quality.

A Warm Water Bath

A convenient method to warm up a bottle of cold baby formula is to place it in a bowl of warm water. You can swirl the bottle occasionally before giving it to your baby to ensure it reaches an even temperature.


As a bonus, the sound of running water can calm an infant. If you find this soothing sound for your little one, check out this video: Relaxing Sounds The Longest Video Of Youtube Water Sounds For Baby.

The Countertop Method

This method requires minimal effort and equipment. Prepare a container with hot water and let the formula sit until it reaches your desired temperature.

Bottle Warmer | My Organic Company

Can I Microwave Baby Formula?

Microwaving milk has been a much-debated topic for quite some time. Even though the microwave was invented in 1946, parents in the 1990s were still advised to heat formula for their infants. However, things changed in 2018 when the American Academy of Pediatrics released data highlighting the safety concerns associated with microwaving formulas. 

Since then, consumers have become more cautious about using a microwave to heat milk. It's crucial to remember that one should never use a microwave to warm up formula.

Microwave | My Organic Company

What If My Baby Will Not Drink Reheated Formula?

Predicting how well your baby will take to reheating the formula is complex. Sometimes, babies might not like the taste or consistency of the reheated formula and feel uncomfortable drinking it. In such cases, it is essential to trust your baby's instincts and not force them to drink it.

If your baby shows discomfort or refuses to drink the reheated formula, discard it and make a fresh bottle for them. This way, you can ensure your baby gets the nutrients it needs and is comfortable while feeding. It is always better to err on the side of caution regarding your baby's health and well-being.

Baby Laughing | My Organic Company

What If My Baby Doesn't Finish a Bottle?

Once your baby has taken a few sips from a bottle of baby formula, you may consider reheating the remaining portion. However, it is important to note that any partially consumed formula should be discarded. This is because your baby's saliva has mixed with the formula, promoting bacterial growth and rendering it unsafe for consumption

It is not advisable to store partially consumed baby formula for later use. Even if you refrigerate or freeze it, the bacteria in your baby's mouth will continue to grow and multiply. If you attempt to feed your baby the formula again, you risk making them ill.

Throwing Baby formula Away | My Organic Company

Reheating Baby Formula

Embarking on your bottle-feeding journey can feel like a lot to take in. However, with time and practice, each step will become second nature. 

At My Organic Company, we are dedicated to providing your family with the highest-quality organic nutrition and expert advice from birth through toddlerhood.

Frequently Asked Questions

Can You Reheat A Bottle Of Formula More Than Once?

No, You should only reheat a bottle of formula once. Harmful bacteria can multiply since the last feeding, which could make your baby sick.

Can You Refrigerate And Reheat Formula After Baby Has Eaten Off Of It?

If your baby has started but has not finished a bottle, you must discard any remaining formula. This means that the formula cannot be reheated. 

Can You Reheat Formula?

The short answer is yes. Formula doesn't have to be heated, but some parents and babies may prefer it that way. 


Please be aware that this information is based on general trends in babies, and it is not medical advice. Your doctor should be your first source of information and advice when considering any changes to your child’s formula and when choosing your child’s formula. Always consult your pediatrician before making any decisions about your child’s diet or if you notice any changes in your child.

Breastfeeding is the best nutrition for your baby because breast milk provides your child with all the essential nutrients they need for growth and development. Please consult your pediatrician if your child requires supplemental feeding.

Author Bio:

Renee is an infant nutrition consultant and a full-time writer. Due to her experience in seeking better nutrition for her premature daughter, she advocates for European baby formula. Renee is fully committed to contributing value to this critical area of child development as a mother of a large family, foster parent, and adoption supporter.

Renee enjoys camping outdoors, swimming, and hiking with her family when she is not working.

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