Disposable heat transfer device and system integrating such a device

1. A system comprising a machine for heating a fluid or fluid foam on demand, the system further comprising a pack comprising a fluid product in an inner volume of the pack, the pack comprising a disposable lid or cap,

wherein a heat transfer device is disposed within the disposable lid or cap for heating the fluid or fluid foam on demand, the heat transfer device comprising a first path defining a first plane through which steam circulates, the heat transfer device further comprising a second path defining a second plane through which the fluid or fluid foam circulates, the second plane is parallel to the first plane, the heat transfer device comprising at least one layer made of a thermally conductive material that is sandwiched in between the first path and the second path, the second path being in contact with the at least one layer in such a way that when the at least one layer is heated, the at least one layer transmits heat to the fluid or fluid foam as the fluid or fluid foam circulates through the second path, such that the at least one layer is heated by a change of phase of the steam into liquid when the steam is circulating through the first path,

the machine comprising a connection configured for receiving the pack, and a heating unit comprises a steam generator disposed within the machine that is configure for transmitting and dispensing steam to the disposable lid or cap such that the steam is circulating through the first path, and a foaming driving unit comprises a motor disposed within the machine that is configured to rotate a rotatable part of a pumping and foaming device in the disposable lid or cap such that the fluid or fluid foam is circulating through the second path.

2. The system according to claim 1 , wherein the connection is configured for receiving the disposable lid or cap.