I am curious if you can take pumped breast milk with you when you are out and about and how long it stays good. I mean, if you are going to be out somewhere where you cant heat a bottle and don't want to breastfeed in public what do you do? Right now I bring ready-to-feed formula but I really want to be able to feed breast milk only because my 5 week old daughter doesn't seem to tolerate the formula too well. Can you take a bottle of breast milk out of the fridge and keep it without putting it with an ice pack? I know this probably sounds confusing but hopefully someone will know what I am trying to say here lol.