Meet the SunRocket Solar Kettle: a portable device that can boil water with sunlight. It uses an evacuated tube with reflective panels to heat and boil water outdoors. The SunRocket also acts like a thermos to keep water hot for hours. The device has a portable design, so you can take it with you everywhere you go. It can make snow and make sterile water as well.
The SunRocket is scratch and weather resistant. It weighs only 2.2 lbs. It could prove useful for camping, picnics, fishing, and emergency situations. Not too expensive either.