With a metal container, rubber gasket is commonly found in the hinged lid to protect the ammunition from moisture damage.
Warsaw Pact nations typically stored and transported ammunition in single-use "spam cans".
Due to their durable construction, used metal ammunition boxes are popularly re-used for general storage and other purposes.
Used ammunition boxes have lead and propellant residue inside, so they should not be used to store food or drink.
Based on the UN Recommendations on the Transport of Dangerous Goods model regulations, each country has coordinated design and performance requirements for shipment.