If made in excess, you can store the rest of it in an airtight container. However, it is best to consume them soon, as they do not stay crisp for a long time. You can use the dried variety to make this snack instead of the canned ones but in that case, you need to let them soak in hot water for at least an hour, else they will be too hard to chew. The calorie content is way less than French fries or potato chips. Besides, these are rich in vitamin A, vitamin C, iron, calcium, and proteins.