Postpartum

How Long Does Powdered Formula Last at Room Temperature? — Bridgetown Baby

Use formula and feeding equipment within one hour of starting a feed

Once you have started a feeding session with a bottle of formula, the formula in that bottle should be used within one hour of the start of that feeding session, to prevent the growth of potentially unhealthy bacteria in formula that can make your baby sick. If your baby needs to eat again after an hour or so, start by making fresh formula in a clean bottle.

Another way to practice formula safety is to clean the feeding equipment, wash it in hot soapy water, and air dry, or put it in the dishwasher if the manufacturer’s recommendations allow. Boiling or microwave sanitizing is usually not necessary.

Main points:

  • Powdered infant formula should be used within 2 hours of preparation or refrigerated immediately

  • Once ready, baby formula can last 24 hours in the refrigerator

  • Formula can last 1 hour at room temperature once feeding begins

  • Throw away any unused formula after feeding

Your baby’s feeding time is an opportunity for bonding and connection that occurs many times a day. By knowing the ins and outs of formula feeding and how to use formula safely, you can feed with reduced stress, with love – and in good health.


Lactation consultants provide professional, compassionate support for your feeding relationship with your baby, however your baby is fed. If you have questions at any step in your feeding journey, Bridgetown Baby’s feeding team is ready to walk alongside you – and your Lactation visits may be covered by insurance! Learn more hereor contact our email warmline for response within 24 hours.

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