how long can you leave infant formular in a bottle under room temperature?

i am not sure about this, especially when using the avents warmer, i am not sure how lomg i can leave the milk in the warmer ,cos most times when i am ready to use the milk the baby might not be hungry at the time, so what do i do to make sure i am not giving him spoilt milk, cos i make up all my bottles once a day and store in the fridge then when i am ready i just bring one bottle out please help

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  • 1 decade ago
    Favorite Answer

    I use ready to feed formula, so I have to make mine ahead of time. here are the "rules"

    From the time you make it and stick it in the fridge, it is good for 48 hours.

    From the time you warm it, it is good for approx 2 hours

    From the time the baby starts drinking out if it, it is good 1 hour.

    discard any formula at the end of a feeding.

    do NOT re-fridge and re-use a bottle that has already been warmed.

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  • 1 decade ago

    I asked that same question to a nurse when I was in the hospital for giving birth to my son 2 months ago. The nurse told me that the portion that the baby did not drink is only good for 1 hour after you have warmed it up. And never put a bottle back in the fridge after it has been heated and drank from. I do the same as you, a batch a bottles a day......isn't it a pain in the but, lol. I would rather be enjoying my baby than washing, sterilizing and making up formula. But a moms gotta do what a moms gotta do. Congrats on the baby !!

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  • tammer
    Lv 5
    1 decade ago

    I used the powder, My daughter was on Nutramigen Hypoallergenic Formula was the only kind she could keep down. I did not make more then i needed. If she was taking 5 oz at the time i made 6. Putting 1 ounce in the fridge in another bottle. If she beeded it i had it, if she didnt , I would use it the next time i fed her.

    To take togo, i would measure out the powder, put it in the bottle and put the cap on. I would take her nersery water and put in another bottle. I could heat it while i was out, Or under warn water in a sick if need be. Just put the water in and shake. Throw out any that is not used. That way baby always has safe formula when out too.

    I had a small tupperwear container of powder that I carried in her baby bag. I made sure I used it up within the week and replaced it. Always had a spair bottle in the bag, and a never left hime without her water.

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  • 1 decade ago

    Once it has been warmed, you ONLY HAVE ONE HOUR for formula. Breastmilk can go 2 hours (because it has antibacterial properties) but formula needs to be tossed within one hour!!

    If you make a pitcher ahead of time and keep it refrigerated, it can keep in the fridge for a day or so (not sure exactly how many hours)

    And NO, once the baby has drank from the bottle, you cannot put it back in the fridge.

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  • 1 decade ago

    I make up a pitcher of formula every day with about what my son eats. Then I pour that into a bottle when he's hungry. The warmer only takes about 5 min to warm it up so I wait until he looks like he's getting hungry, you'll start to get used to the cues your baby gives.

    If he eats out of it you must toss it within one hour. If you've warmed it it can be at room temp for up to 2 hours before you begin feeding

    Source(s): mom to one son 8 weeks old
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  • Anonymous
    1 decade ago

    I am not an expert on baby formula but I think the same rules for adult food applies. Any food item cannot be left in the danger zone (40' - 140'F) for no more than 4 hours. Most restaurants now use a 2 hour rule. That means that cold foods cannot be left out to reach a temperature of over 40 degrees and hot foods cannot reach a temperature of under 140 degrees for more than 2 hours. And remember, when in doubt throw it out !!!

    Source(s): Heath Department certification
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  • 1 decade ago

    I used to work for a few daycare centers, and if you ask anyone from there they would tell you that we are not allowed to leave a bottle out for over an hour, but our nurses always said that was our precaution, that in fact the longest you should leave a bottle out after the baby's mouth has touched the nipple is 2 hours. this is because bacteria multiplys once the baby has put his mouth on the nipple, the bacteria won't hurt your child but will make their tummy's upset after 2 hours, some babies have gotten really sick from this too, so just be careful!

    Source(s): professional caregiver
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  • 1 decade ago

    I was reading up on infant formula just tonight! Any formula that is 48 hours old is garbage. Used or not. The website I was on advised making only what you need when you need it. For example; if you'll use 5 bottles a day, then make only 5. If baby doesn't eat all the oz per bottle, throw it away. Personally, I make them up as I go along, it makes for less waste.

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  • 1 decade ago

    It would all depend on what temperature the room is, in winter you would probably be able to leave it out a bit longer than in summer when given the warmer temperature it would go off quicker. I personally would leave formula out longer than an hour regardless of the temperature.

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  • 1 decade ago

    Follow up question please... is it NOT ok to put back in the fridge unfinished milk then give it to the baby the next time? Because with this you're not leaving the milk in room temp. And how about for breastmilk?

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