I keep my dehydrated fruits and veggies in zip-type freezer bags. If they've been dehydrated correctly, they should keep indefinitely. I've had my failures with under-drying things, too, and have probably over-dried things now for years to be on the safe side. I usually put those tightly closed freezer bags into quart or 1/2 gallon canning jars to keep bugs out, especially if I'm planning to keep it very long. I try to rotate my stock of stuff, but something always gets forgotten.