Leather Case for Gun Patches and a Powder Flask
On some flasks, there is an adjustable nozzle that ensures an equal amount of powder is dispensed each time the lever is thrown.
Patches were used to clean firearms. The ordinary firing action of a gun releases fine particles of gunpowder, metals (lead and copper from the bullet moving over the riflings), and other contaminates into the inner spaces of a firearm. This may cause malfunctions or, in rarer cases of extreme buildup, may raise the barrel pressure too high causing the firearm to explode upon being fired.