Water
Clean drinking water is one of the first things to sort out in a home emergency kit. Here you'll find containers so you can easily set water aside for your household.
The authorities' advice
The Danish authorities advise planning on 3 litres of water per person per day for drinking and cooking, so 9 litres per person for three days. Remember water for any pets, and replace the water regularly.
Source: Prepared for crises, Danish Agency for Civil Protection