Milk stored in cardboard boxes, used old milk bags. If you want to use, soak it in a normal cool night 1, soluble (can be stored in the refrigerator for 1 night only, and should not be soaked in ice box.)
Breast Milk Storage bags in the box hard to use old milk before if you want to use to soak in the cool night to melt 1 normal (can be stored in the refrigerator 1 nights only, and should not be in the freezer).