Features : 1.The Benefits of Ice Packs: Shipping Ice packs are made of reusable HDPE material. After freezing keep food cool and fresh for up to several hours in insulated bags or lunch boxes. 2.Easy to Use: Just put the ice pack (you need to replenish the freezing solution) in the refrigerator for at least 6 hours. With insulation bag lunch box rice bag cooler use better. 3.Purpose: This ice box is reusable and has a long freezing time. Ice boxes can provide a cooling effect for the transportation of food and seafood perishables breast milk medicines vaccines etc. 4.Use in a Variety of Situations: Our ice packs can be placed in gym bags diaper bags insulin bags meal preparation containers or picnic baskets. It's also perfect for sore muscles and recovering from track and field workouts. 5.After-sales Service: If you have any problem please contact us immediately we will help you solve it as soon as possible. Specifications: Material: HDPE material 200g Size: 15*10*2cm 250g Size: 17*8*2cm 300g Size: 18*11*2cm 350g Size: 16.5*9*3.8cm 400g Size: 18.5*16.5*2cm 500g Size: 22*14.5*2.5cm 800g Size: 23*17.5*2.5cm Notice: 1.Actual color may be slightly different from the image due to light effect. 2.Please allow 1-3cm deviation due to manual measurement. includes: 1 * Ice Freezer Box "