I have bought some ready to drink cartons of formula as I am going overseas & wanted to have a mixture of sterilised water & ready to drink cartons with me to cover all basis.
Then I wondered if instead of carrying the cartons around with me if I could just pour them into my sterilised bottles & have that with me too? But, how long can they be in the bottles for? In the carton they last for a few weeks & have been in my pantry as I don't think they need to be refrigerated. So can I put them in my bottles & have them in there for only 2 hours? Or can I have them in the bottles for 20 hrs? I am confused.