Make sure you use food-grade water containers. Reliance Aqua-Tainers are storage jugs that hold 7 gallons, are BPA free, stack neatly and have a built-in spigot. You could also refill water cooler jugs or any other clean water-friendly containers. Avoid the use of milk jugs and other containers that could invite bacteria. If you're pouring well water or spring water into your own containers, drip in two drops of bleach for each quart of water. This will disinfect the water and give you several months of safe storage, especially in cooler temps. Tap water that has already been treated could use a bit of disinfectant, so add just 1 drop of bleach per quart.