Juice should be stored in a cool dark place (the pantry works fine). Once opened, juice should be stored in a tightly closed container to keep out moisture and other contaminants. It should always be stored in the refrigerator immediately after use.
If your juice is in a can, be sure to transfer the leftovers to a plastic or glass container before refrigeration.
Some benefits of proper food storage include eating healthier, cutting food costs and helping the environment by avoiding waste.