Completely remove the lid and label before heating the can to prevent internal combustion or the label catching fire. Store a 3-day supply of water for each family member. The needs of each person will differ depending upon age, physical condition, activity, diet, and climate. A normally active person needs to drink at least 2 litres of water daily. Children, nursing mothers, and ill people need more.
Additional water is necessary for food preparation and hygiene.
At least 4 litres per person per day should be stored. Water should be stored in clean and sanitary containers. Plastic containers are good because they are lightweight and unbreakable. Glass containers are non-permeable but they are also breakable and heavy. Metal containers should be be considered as a last resort because they may corrode and tend to give water an unpleasant taste.