[ Keep Food & Drinks Cold ]With cooler backpack, keep cold and fresh for 18 hours. Great for lunch box and outdoor activities. [ Keep Breastmilk Fresh]Bring back fresh breast milk for your baby to grow better. No longer need to carry multiple backpacks! [ Save Space] ice packs will fit in just about any lunch box or coolers that you can think of and takes up less food or drink space. [ Reusable ]Not like ice, ice packs don't make a mess as they thaw and will stay freeze for longer. sandwiches and other food items don't get ruined when ice packs start melting. [ Note: ]The water-filled ice box can be used after receiving 80% of the cold water, and then put it in the refrigerator for about 5-10 hours. Because of thermal expansion and contraction, it cannot be filled with too much water. Capacity: 200ML Note: no liquid Colour: blue Material: PE Size: 16.5x11x1.5cm Package Contents: 8 * Ice Packs Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.