anyone tried storing breastmilk with daiso Styrofoam box with ice pack inside? will it be lasting than using cooler bag or cooler bag is better? in dilemma...

I would suggest fridge-to-go too if you will be using it frequently. It can help keep the milk chilled for up to 12 hour. Take a look at this review for more information: http://livingwithlowmilksupply.com/cooler-bag-for-breast-milk) But if you are only going to use it once in a while, the cooler with ice pack (which you can also get from Daiso) would work well too.