In the human body, water play important rool. hindusthan unilever make a water purifier it is really good obiect. it is non electrical. and fully made up of best quality plastic. in this water purifire four water tank is present. one tank present on the top then second is present at middel and it is smaller than other tank then third is transfersal tank and fourt tank is black in colur. in this purifire water become pure in four step. and it is very good for your health.