Fontaine Double Layer Cooler Lunch Bag Keep Breast Milk Food Fresh Dimension: 9.5 x 6.3 x 8.7 inch, Capacity:8 L Cold preservation time:6-16 hours;12-20 hours with blue ice.Soaking time:5-7 hours;6-8 hours with hot cold pack An insulated cooler bag perfect for Breast milk storage bag,Lunch bento bag or snacks for outdoor,working or school Material: Outer 600D Oxford cloth;Inner PVC (middle layer 100mm insulated cotton,Super thick cotton insulation, better thermal insulation effect) Use with food containers for an affordable and green lunch box solution; can also be used as a medication travel bag or for a diabetic insulin kit