Making up formula at home with flask?

[Ppeter500]

is it bad for me to make up formula by keeping hot water in a flask throughout the day (I check regularly with a thermometer that the water isn’t below 70c), then cooling down in bowl of cold water?
everyone says use prep machine but my midwife has told me a few horror stories which has put me off using it.
j know the thermal flask method is mostly for out and about but it’s just easiest for us at home so that we don’t have to boil the kettle and wait when baby is crying wanting a bottle.
jjst wondered if others do the same?
I do have the rapid cool flask but again midwife told me not to use as it doesnt allow the hot water to stay hot for long enough to kill bacteria…..

The point of the boiling hot water is to sterilise the formula not the water, water kept warm in a flask won’t be safe to use to do that.

OP says she’s regularly checking that the water in the flask is over 70’c which is the recommended temp for sterilizing the formula.

That's fine or have two flasks

One with hot boiled water

One with cold previously boiled water

And make up feeds that way so own perfect prep

That how I often make feeds up and I'm a maternity nurse

It's roughly 1/3

So for a 4oz bottle 1 oz hot. Add 4 scoops - swirl and then add 3 oz of the cool boiled water

Or 6oz - 2 oz hot. 6 scoops. Swirl and add 4oz prev boiled cold water

You can get a kettle that boils to 100c and then holds it at 70c ready for making bottles. So the same as using your flask but you don't have to do the temperature checks you're currently doing. This is what we did and kept a jug of water in the fridge to put the bottle in to cool which took about 10 mins

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I used to use a flask of hot water and a baby bottle of boiled cooled water that was in the fridge. I was making up prescription formula which had to have much cooler water though (35 degrees I think)

I do this, but I'm doing half and half. Half hot water and half cold boiled water. I think it's totally fine. I'm using this method till baby is feeding enough to make it in the tommee tippee

Glad you do the same @JoyApple

Sometimes I do 50/50

Some babies prefer hotter

I made up 4 bottles at a time with boiling water, quickly cooled them in a sink of cold water and stored them at the back of the fridge. I'm sure the NHS website said it was alright to do that. Made everything a million times easier, having bottles ready to go.

Thanks so much ladies this is super helpful really appreciate the responses!