The Ice Pack Kawaii Panda is an ice pack, kind of small bag of gel refrigerant that will keep food in your lunch box cool.
Place the Ice Pack Kawaii Panda in the freezer before bed. The morning before leaving, put it next to your bento (under cover, for example, or in a portable cooler). The cooling action of the pocket of cold will last about three hours.
The ice pack can also be used to relax. Place it on your forehead if it is hot or if you feel feverish. Place it also on your legs to relax after a long day of walking.