Fashion Lunch Box Bag Multi-functional, Long Time Cooler Bag, Large Size 2 Layers Insulated Cooler Compartment, Store Milk Medicine and Food When Outdoor Work or Travel (Royal Blue) HEAT PRESERVATION - It can keep cold for 4 hours when use it alone, up to 12-16 hours when used with ice pack. Keeping warm time : 2 to 4 hours, 3 to 6hours when used with ice-hot packet. DELICIOUS AND FRESH - Enjoy delicious meal when you are out for work or outdoor sports and travel. No junk food any more. Perfect to store breast milk for kid or some medicine SIZE - Size 24cm*16cm*22cm , with removable large thermal insulation compartment. Designed with practical small pockets. FLEXIBLE - 2 alloy zippers make it more easy to store different things. Shoulder strap can be removed easily . 2 layers of thermal insulation , no mixture of taste of different food. MATERIAL -Material:600D waterproof Oxford+10MM EPE insulation cotton+Environmental protection PVC