A vial assembly for a dispensing system, comprising: a vial container having a container body defining a vial aperture and a vial cavity in fluid communication therewith; a cap having a cap body affixed across said vial aperture so as to enclose said vial cavity, said cap body defining a gas filter aperture through said cap body, said filter aperture supporting a gas filter media therein, said cap body further defining a product passageway therethrough, said cap further comprising: an elongate conduit including an elongate conduit body defining opposed first and second open ends (70, 72) and an elongate conduit passageway extending in fluid communication therebetween, said second open end of said conduit extending through said product passageway of said cap and in sealed engagement with said cap body, characterized by: a first valve member supported at one end thereof by said first end of said conduit; and a second valve member removably attached to said first valve member at an opposing end of said first valve member, wherein said second valve member is pressure-activated and biased to a normally-closed position and open under fluid pressure, said first and second valve members (96, 98) are adjustable between a first orientation in which the first valve member is in a closed position ensuring fluid isolation of said vial cavity and a second orientation in which the first valve member is in an open position to place said vial cavity in open fluid communication with an inlet port of said second valve member. a vial container having a container body defining a vial aperture and a vial cavity in fluid communication therewith; a cap having a cap body affixed across said vial aperture so as to enclose said vial cavity, said cap body defining a gas filter aperture through said cap body, said filter aperture supporting a gas filter media therein, said cap body further defining a product passageway therethrough, said cap further comprising: an elongate conduit including an elongate conduit body defining opposed first and second open ends (70, 72) and an elongate conduit passageway extending in fluid communication therebetween, said second open end of said conduit extending through said product passageway of said cap and in sealed engagement with said cap body, characterized by: a first valve member supported at one end thereof by said first end of said conduit; and a second valve member removably attached to said first valve member at an opposing end of said first valve member, wherein said second valve member is pressure-activated and biased to a normally-closed position and open under fluid pressure, said first and second valve members (96, 98) are adjustable between a first orientation in which the first valve member is in a closed position ensuring fluid isolation of said vial cavity and a second orientation in which the first valve member is in an open position to place said vial cavity in open fluid communication with an inlet port of said second valve member. an elongate conduit including an elongate conduit body defining opposed first and second open ends (70, 72) and an elongate conduit passageway extending in fluid communication therebetween, said second open end of said conduit extending through said product passageway of said cap and in sealed engagement with said cap body, characterized by: a first valve member supported at one end thereof by said first end of said conduit; and a second valve member removably attached to said first valve member at an opposing end of said first valve member, wherein said second valve member is pressure-activated and biased to a normally-closed position and open under fluid pressure, said first and second valve members (96, 98) are adjustable between a first orientation in which the first valve member is in a closed position ensuring fluid isolation of said vial cavity and a second orientation in which the first valve member is in an open position to place said vial cavity in open fluid communication with an inlet port of said second valve member. a first valve member supported at one end thereof by said first end of said conduit; and a second valve member removably attached to said first valve member at an opposing end of said first valve member, wherein said second valve member is pressure-activated and biased to a normally-closed position and open under fluid pressure, said first and second valve members (96, 98) are adjustable between a first orientation in which the first valve member is in a closed position ensuring fluid isolation of said vial cavity and a second orientation in which the first valve member is in an open position to place said vial cavity in open fluid communication with an inlet port of said second valve member.