7 MO DD has three ready-to-drink formula feeds a day (i.e. I don't mix it myself, just pour the carton straight into a sterilised bottle.)
Due to illness over the last few days, she has only been able to take half a carton each time, even though I have poured the whole carton into her sterilised bottle.
Can I keep the other half in the sterilised bottle in the fridge and use it for her next feed? And for how long can I keep it in the fridge?