Water is prime requirement to survive in the time of disasters. The armies and the soldiers have to carry the packets of waters with them because clean water is not available during the war times. The problem can be solved if a solar water purifier comes to market and it must of the size which is portable and can be carried in small bags. There are many technology oriented products available in the market to clean water but all of them require some electricity to be in the operations. The technology is being developed which will use solar power to clean the water. Such innovation would prove to be of good value for the researchers, archeologists and other people who have to be in the fields for several months. The sunlight is available all over the world naturally. The nano-technology can lend some support to development because it would help to make the equipments which are not very large in size. Such equipment would be best seller in the market for sure.