Cooled boiled water for formula

[wishIwasonholiday10]

If you use special formula that’s made with cooled boiled water (eg nutrimigen) is the cooled boiled water good to keep for several days if not used straight away or do I need to tip it out and start again each day. At the moment it’s only being used for topups so not using much. Can I boil 1L of water and keep it for a few days?

We use an anti reflux milk which requires cooling for 45 mins so maybe not the same, but we reboil every time we need a new bottle.

I’d keep in fridge for 24hrs. Make new the following day.