British Sun Jar

It is a mysterious sun jar, which can collect sunshine in daytime. In an ancient myth, a little girl said to her lover that if he could make her look the sunshine at night, she would merry him. So her lover made his best to search that sunshine from then. At last, he got over many difficulties and beaten a mountain monster, then he got a jar that could collect sunshine. He and the little girl had a happy ending.

Actually, there is an automatic photosensitive device, which emit its light only at night, in the sun jar. Of course, there is also a switch in it, you could close it any time you want.