Yes they can be stored in air tight containers and zip locks in the freezer. It will make them last along time. I put mine in ziplocks and then in another ziplock or an air tight container. If you buy large amounts this is the best way to keep them so the will last. As far as the time length I would have to say several years if kept the right way. The reason for doing this is because at room temperatures the food degrades alot faster and loses vitamins. The main thing is to not get water into any food, air tight seal and to keep it away from heat and light. A dark cool place is recommended. What better place is there than the freezer? very dark and very cool!!