Army Surplus Iconic 1 Quart canteen. Canadian and American Forces this is still issued there are a lot of other options now but this has been feild tested for decades and works like nothing else as well as it does not get more ARMY than a GREEN Canteen Caps are compatible with modern gas mask hydration systems Puncture resistant spill proof and BPA free 1 Quart (er of a Gallon) or in metric 0.95 Liters (1L)