Hardtack
Hardtack is a hard, shelf-stable survival bread cracker made from flour, salt, and water that can last for decades without refrigeration.
Estimated value as of 2026 · Source: Etsy listing for Goings Gourmet Homemade Hardtack Survival Bread Crackers
Fun Fact
Hardtack has a 25-year shelf life and was historically used by soldiers and sailors for centuries because it requires no refrigeration and remains edible through extreme conditions.
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