Sunlight Kettle / Solar Kettle

In the snow, high mountain , or outdoors, we can use the sunlight to get the hot water easily. The capof kettle is made by convex lens and the inside of bottle is made by high thermal matel, they could boil water and keep warm. The focus of the convex lens is on the inside metal stick, concentrates in the focal length of sunlight to generate heat, and boils water.