I also somehow nice design.
Cooler this summer, try to cardboard material would suggest. The size, 50x35x30 cm, about 30 vol-liter cardboard box cooler than the eco-plastic and Styrofoam. Materials are made of recycled cardboard that is 70% of the material has been coated with a waterproof sheet in it. It can be used multiple times by the coating rather than disposable. During the 25-degree temperatures, you can keep about 5 degrees to about 36 hours If you put the ice in the cooler Max Box