Storing breast milk

Hi so I'm a soon to be first time mom and I'm 27 weeks and plan on exclusively breast feeding my daughter as long as everything goes well. I also plan on pumping and having a stash.I wanted to know if anyone had any advice on the best way to store breast milk and also what to do when your out in public as far as having a bottle with you and how long that bottle is good for, if that makes sense?I know that sounds like a dumb question but my brother and I were formula babies and my mil didnt breast feed either. So non of the women in my life can really give me advice. I have plans on meeting with a lactation consultant once I give birth while at the hospital but I'd just really like some information.