Hi Ladies! My little one is a week old today and im going to start pre making my bottles. I have been using the pre made cartons but it is just working out far to expensive! My question is if i pre make and store in the fridge, when i go out should i keep the bottle cold with an ice pack and then find somewhere to warm it whilst out? or warm it before i leave and keep it warm in a bottle bag thing??? Im confused! lol!