I know it should be with hot boiled water, into a sterilised bottle. So far so good, this is what I have been doing 15-20 mins before a feed and letting it cool down.
If we are going out for the day, can't I just make a few bottles up that way, cool them and take them all (in an insulated bag + ice pack), and then warm one up when needed? As far as I can see, all the advice says don't make them up in advance as formula isn't sterile - but if you make it with boiling water, in a sterilised bottle, where's the risk?
Thank you ladies !