An aircraft lavatory oxygen source for use in an aircraft lavatory to dispense supplemental oxygen suitable for breathing by a user in small quantities, comprising: an oxygen storage vessel configured to store gaseous oxygen at a first oxygen pressure and having suitable purity for breathing, said oxygen storage vessel having an opening sealed by a pressure seal (34, 44) configured to retain high pressure oxygen in said oxygen storage vessel at the first oxygen pressure, said pressure seal (34, 44) being configured to seal said oxygen storage vessel against flow from said oxygen storage vessel until said pressure seal (34, 44) is broken; a manifold connected in fluid communication with said pressure seal (34, 44) of said opening of said oxygen storage vessel and configured to receive a flow of oxygen from said opening of said oxygen storage vessel when said pressure seal (34, 44) is broken, said manifold including an oxygen flow path having an outlet, said oxygen flow path being connected in fluid communication with said pressure seal (34, 44) of said oxygen storage vessel; and an actuator (32, 35), the actuator comprises a hollow, ported needle, the actuator (32, 35) configured to break said pressure seal (34, 44), said pressure seal being configured to be broken, fractured or ruptured by said actuator (32, 35) upon activation of the actuator (32, 35) to initiate a flow of oxygen through said opening of said oxygen storage vessel, the aircraft lavatory oxygen source being characterized in that: said oxygen flow path of said manifold includes a plurality of oxygen flow rate control orifices (42, 46; 48a, 48b) arranged sequentially in said flow path, and downstream of the hollow, ported needle included in the actuator in said oxygen flow path, the oxygen flow rate control orifices (42, 46; 48a, 48b) are configured to control oxygen flow rate through the outlet to deliver a defined amount of oxygen at a second oxygen pressure lower than said first oxygen pressure to support human physiological sustenance requirements at defined aircraft altitudes, time intervals and aircraft decent profiles, or time release characteristics. an oxygen storage vessel configured to store gaseous oxygen at a first oxygen pressure and having suitable purity for breathing, said oxygen storage vessel having an opening sealed by a pressure seal (34, 44) configured to retain high pressure oxygen in said oxygen storage vessel at the first oxygen pressure, said pressure seal (34, 44) being configured to seal said oxygen storage vessel against flow from said oxygen storage vessel until said pressure seal (34, 44) is broken; a manifold connected in fluid communication with said pressure seal (34, 44) of said opening of said oxygen storage vessel and configured to receive a flow of oxygen from said opening of said oxygen storage vessel when said pressure seal (34, 44) is broken, said manifold including an oxygen flow path having an outlet, said oxygen flow path being connected in fluid communication with said pressure seal (34, 44) of said oxygen storage vessel; and an actuator (32, 35), the actuator comprises a hollow, ported needle, the actuator (32, 35) configured to break said pressure seal (34, 44), said pressure seal being configured to be broken, fractured or ruptured by said actuator (32, 35) upon activation of the actuator (32, 35) to initiate a flow of oxygen through said opening of said oxygen storage vessel, the aircraft lavatory oxygen source being characterized in that: said oxygen flow path of said manifold includes a plurality of oxygen flow rate control orifices (42, 46; 48a, 48b) arranged sequentially in said flow path, and downstream of the hollow, ported needle included in the actuator in said oxygen flow path, the oxygen flow rate control orifices (42, 46; 48a, 48b) are configured to control oxygen flow rate through the outlet to deliver a defined amount of oxygen at a second oxygen pressure lower than said first oxygen pressure to support human physiological sustenance requirements at defined aircraft altitudes, time intervals and aircraft decent profiles, or time release characteristics.