It is a Japanese lunchbox.
In Japan, it is called "Bento Bako".
This pattern is a butterfly.
A butterfly has a cute and mysterious image in Japan in old period. 
Why don't you try to be fashionable in your lunchtime?

Size: 137×83×70
Capacity: Upper  180ml
            　Lower  220ml



Electronic range: OK
Dishwashing machine: OK

※ When heating it, take off an inside lid.