$2/kg of material to get 6 liters of water per day. But what’s the total yield for the $2? In other words single or multiple use? In some areas of the world

$2/kg of material to get 6 liters of water per day. But what’s the total yield for the $2? In other words single or multiple use? In some areas of the world there’s a serious fresh water crises. Very poor people are left buying expensive bottled water to avoid disease.