Water is more important than food.
You should store two weeks of water for each person in your home. Water can be stored in old juice bottles, clean water drums, water jugs (you can buy containers specifically for home water storage). You should store at least one gallon of water per person per day, but preferably 1.5 - 2 gallons per person per day.
Check out some of our past posts (below) for more information.
Water Storage Methods
How to Store Water in Plastic Bottles
Emergency Water (water in your home)
Water Storage Guidelines (from ProvidentLiving.org)