In a paper bindle wrapped in paper towel. Place into a sealed zip lock bag. (Thicker freezer ones are best.) Now wrap said bag in another paper towel, and place that into another zip lock bag. Repeat once more for a total of 3 bag layers.
Place this in the freezer. Guaranteed to last forever. If your freezer gets a lot of moisture, occasionally switch out the paper towels for fresh ones. I’ve lived in pretty humid places and only had to do this once every year or two.
-GC