An ammunition box or cartouche 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. The resealing ammunition box is largely a NATO tradition.
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. Commercially made new or fully reconditioned used cans do not have this problem. 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.