A valve comprising: a housing configured to interengage with a container, and having at least one axis and at least one aperture; a first poppet axially movable within said housing between a first closed position and a first open position; a second poppet axially movable within said first poppet between a second closed position and a second open position; a first seal between said first poppet and said housing; a second seal between said first poppet and said second poppet; a first resilient member disposed within a first space between said housing and said first poppet, and having a resilient force sufficient to hold said first poppet in said first closed position such that said first poppet urges said first seal against said housing when a pressure differential axially across said first poppet is below a first point, and to allow said first poppet to move in a first direction to said first open position when said fluid pressure differential exceeds said first point; a second resilient member disposed within a second space between said first poppet and said second poppet, and having a resilient force sufficient to hold said second poppet in said closed position such that that said second poppet urges said second seal against said first poppet when a pressure differential axially across said second poppet is below a second point, and to allow said second poppet to move in a second direction, different from said first direction, to said second open position when said pressure differential exceeds said second point; an actuator operatively connected to said second poppet, said actuator being operable for manually moving said second poppet to said second open position, said actuator is biased in said first direction with said first resilient member and being manually movable in said second direction relative to said housing, said actuator being disposed adjacent said second poppet such that said movement of said actuator in said second direction contacts said second poppet and moves said second poppet to said second open position, characterized in that said actuator is contained in said housing. a housing configured to interengage with a container, and having at least one axis and at least one aperture; a first poppet axially movable within said housing between a first closed position and a first open position; a second poppet axially movable within said first poppet between a second closed position and a second open position; a first seal between said first poppet and said housing; a second seal between said first poppet and said second poppet; a first resilient member disposed within a first space between said housing and said first poppet, and having a resilient force sufficient to hold said first poppet in said first closed position such that said first poppet urges said first seal against said housing when a pressure differential axially across said first poppet is below a first point, and to allow said first poppet to move in a first direction to said first open position when said fluid pressure differential exceeds said first point; a second resilient member disposed within a second space between said first poppet and said second poppet, and having a resilient force sufficient to hold said second poppet in said closed position such that that said second poppet urges said second seal against said first poppet when a pressure differential axially across said second poppet is below a second point, and to allow said second poppet to move in a second direction, different from said first direction, to said second open position when said pressure differential exceeds said second point; an actuator operatively connected to said second poppet, said actuator being operable for manually moving said second poppet to said second open position, said actuator is biased in said first direction with said first resilient member and being manually movable in said second direction relative to said housing, said actuator being disposed adjacent said second poppet such that said movement of said actuator in said second direction contacts said second poppet and moves said second poppet to said second open position, characterized in that said actuator is contained in said housing.