Hi,
NHS website says you can pre make formula and store in fridge for 24 hours if can't make fresh.
I have seen a formula pitcher online that mixes up to 32 oz rather than making up individual bottles.
Could you use a sterilised Pyrex jug and sterilised spoon to make up a few bottles with the correct boiled cooled water and powder and then Pour into individual bottles to store in the fridge? Or a sterilised jug with a lid and keep on fridge and pour into sterilised bottles when ready to heat?
Making it in one jug and splitting the mixture seems an easier option than making 4/5 individual bottles. Just wondering if there's a reason why this shouldn't be done as seems common in the USA but I know their rules differ.