A system for preparing a food product, comprising a preparation machine and a sealed disposable container for preparing and retaining the food product, wherein the disposable container has an entry wall, a bottom wall opposite to the entry wall, and a lateral wall, which define an internal volume, pre-packaged in which is a predetermined amount of at least one first food substance or of a precursor thereof, wherein the preparation machine comprises at least a stationary structure, a hydraulic circuit, and a control system (4, 39), wherein the hydraulic circuit comprises at least one water-supply source, means for heating water, and pumping means, wherein the hydraulic circuit further comprises a first external dispensing element, designed to be supplied with pressurized hot water and/or steam, the system being characterized in that: - the disposable container, substantially at the entry wall, has at least one axially hollow coupling element (18, 26), which defines at least part of an inlet of the disposable container; - the disposable container comprises an axially extending injector element, couplable with the at least one coupling element (18, 26) or is integrally formed or fixed therewith, in such a way that at least a first distal portion of the injector element extends within the internal volume; - the first dispensing element and the at least one coupling element (18, 26) are configured for mutual coupling, in particular sealed coupling, the hydraulic circuit being controllable, in particular through the control system of the preparation machine, for conveying pressurized hot water and/or steam to the first dispensing element, for the corresponding injection into the internal volume of the disposable container through the injector element. wherein the disposable container has an entry wall, a bottom wall opposite to the entry wall, and a lateral wall, which define an internal volume, pre-packaged in which is a predetermined amount of at least one first food substance or of a precursor thereof, wherein the preparation machine comprises at least a stationary structure, a hydraulic circuit, and a control system (4, 39), wherein the hydraulic circuit comprises at least one water-supply source, means for heating water, and pumping means, wherein the hydraulic circuit further comprises a first external dispensing element, designed to be supplied with pressurized hot water and/or steam, the system being characterized in that: - the disposable container, substantially at the entry wall, has at least one axially hollow coupling element (18, 26), which defines at least part of an inlet of the disposable container; - the disposable container comprises an axially extending injector element, couplable with the at least one coupling element (18, 26) or is integrally formed or fixed therewith, in such a way that at least a first distal portion of the injector element extends within the internal volume; - the first dispensing element and the at least one coupling element (18, 26) are configured for mutual coupling, in particular sealed coupling, - the disposable container, substantially at the entry wall, has at least one axially hollow coupling element (18, 26), which defines at least part of an inlet of the disposable container; - the disposable container comprises an axially extending injector element, couplable with the at least one coupling element (18, 26) or is integrally formed or fixed therewith, in such a way that at least a first distal portion of the injector element extends within the internal volume; - the first dispensing element and the at least one coupling element (18, 26) are configured for mutual coupling, in particular sealed coupling, the hydraulic circuit being controllable, in particular through the control system of the preparation machine, for conveying pressurized hot water and/or steam to the first dispensing element, for the corresponding injection into the internal volume of the disposable container through the injector element.