An ammunition box is a container designed for safe transport and storage of ammunition. It is typically made of metal and labelled with caliber, quantity, and manufacturing date or lot number. A rubber gasket is commonly found in the hinged lid to protect the ammunition from moisture damage.
Due to their durable construction, used metal ammunition boxes are popularly re-used for general storage and other purposes Players in the sport of geocaching commonly use ammunition boxes as the containers to hide logbooks and treasures. Used boxes are often sold at military surplus stores.
The resealing ammunition box is largely a NATO tradition. Warsaw Pact nations typically stored and transported ammunition in single use "spam cans" (which are widely available on the surplus market today).
Not all ammunition boxes are metal, however. Wood and paper have also historically been used as a method of packaging and selling ammunition. Some enthusiasts and investors collect historical ammunition boxes.