I breastfeed, but then we also supplement with breastmilk (when I can pump enough) and formula. Whenever we are out and about we always supplement with formula, as I'm not quite sure how to travel with breastmilk ...
How do you do so? Do you bring it in a cooler, and if so, does your baby like it cold? Do you bring it room temperature, and if so, how long can it be room temp?
Any other suggestions?