I’ve been nursing but I need to start supplementing with formula and I’m not sure the right way to heat the water , I was thinking to boil it and then store it in a sealed container in the fridge , and the microwave it to heat it up, mix it with formula and put back in fridge for a few minutes to cool it down? Is there a more efficient method than that? My little girl goes from fine to extra angry really quick if she doesn’t get fed immediately