System for the preparation of a liquid product, e.g. a liquid food product, e.g. a beverage, which system comprises: a) a disposable cartridge (1; 50; 70) filled with a single serve portion of a liquid ingredient to be combined with a base liquid for the preparation of a liquid product, e.g. a beverage concentrate to be combined with water, e.g. carbonated water, for the preparation of a beverage, the disposable cartridge (1; 50; 70) comprising: a cartridge body (2; 52; 72) with a bottom (3; 53) and a top, the body (2; 52; 72) delimiting a reservoir that is filled with a single serve portion of a liquid ingredient, wherein the cartridge body has an aperture in communication with said reservoir, which aperture is hermetically sealed by a sealing film (6; 56; 77), e.g. a top sealing film, said sealing film having a portion that covers said reservoir, wherein cartridge body is provided with one or more dispensing passages (15, 25; 80) arranged to dispense the liquid ingredient from the reservoir, b) a dispensing apparatus (100; 200), e.g. a beverage dispensing apparatus, the apparatus comprising: - a holder (110; 210) adapted to accommodate and retain the disposable cartridge at a dispensing location in the apparatus, - a pressurized gas source, preferably a pressurized air source, e.g. an air pump, wherein the apparatus (100; 200) is adapted to bring said pressurized gas source (130; 230) in direct communication with the reservoir of the disposable cartridge (1; 50) so as to allow said liquid ingredient therein to be pressurized by said gas thereby assisting the dispensing thereof from the reservoir via said one or more dispensing passages (15, 25; 80), wherein the system is adapted to create one or more openings (56a; 77a) in said portion of the sealing film (6; 56; 77) that covers the reservoir, characterized in that the dispensing apparatus (100; 200) further comprises a pressurization dome member (140; 240) having a peripheral gas seal, e.g. along a periphery thereof an outer gas seal, which is adapted to sealingly engage the disposable cartridge (1; 50) around a location where said one or more openings (56a; 77a) are created in said sealing film (6; 56; 77) to allow entry of said pressurized gas into the reservoir, and in that the pressurized gas source (130; 230) is connected to said dome member (140; 240) and is adapted to feed pressurized gas beneath said dome member (140; 240) within the contour of the peripheral gas seal sealingly engaging the disposable cartridge (1; 50), so as to allow said liquid ingredient in said reservoir to be pressurized by said gas via the one or more openings in said sealing film, thereby assisting the dispensing of the liquid ingredient from the reservoir via said one or more dispensing passages (15, 25; 80). a) a disposable cartridge (1; 50; 70) filled with a single serve portion of a liquid ingredient to be combined with a base liquid for the preparation of a liquid product, e.g. a beverage concentrate to be combined with water, e.g. carbonated water, for the preparation of a beverage, the disposable cartridge (1; 50; 70) comprising: a cartridge body (2; 52; 72) with a bottom (3; 53) and a top, the body (2; 52; 72) delimiting a reservoir that is filled with a single serve portion of a liquid ingredient, wherein the cartridge body has an aperture in communication with said reservoir, which aperture is hermetically sealed by a sealing film (6; 56; 77), e.g. a top sealing film, said sealing film having a portion that covers said reservoir, wherein cartridge body is provided with one or more dispensing passages (15, 25; 80) arranged to dispense the liquid ingredient from the reservoir, b) a dispensing apparatus (100; 200), e.g. a beverage dispensing apparatus, the apparatus comprising: - a holder (110; 210) adapted to accommodate and retain the disposable cartridge at a dispensing location in the apparatus, - a pressurized gas source, preferably a pressurized air source, e.g. an air pump, - a holder (110; 210) adapted to accommodate and retain the disposable cartridge at a dispensing location in the apparatus, - a pressurized gas source, preferably a pressurized air source, e.g. an air pump,