A disposable tube unit (140) adapted for use in a heat exchanger (130) for a beverage dispensing apparatus (100), wherein the disposable tube unit (140) is configured to guide a beverage through a tank (150) of the heat exchanger (130), wherein the tank (150) is configured to contain a cooling medium, wherein the disposable tube unit (140) comprises:
- a fluid inlet (142) fluidically connectable to a reservoir section (110) of the beverage dispensing apparatus for connecting to a beverage reservoir (190);
- a fluid outlet (144) fluidically connectable to a faucet (120) of the beverage dispensing apparatus (100);
- and
- at least one tube (146) extending from the fluid inlet (142) to the fluid outlet (144),
- wherein the disposable tube unit (140) is configured to be mounted in the tank (150) and to be removed from the tank (150) in non-destructive manner, wherein, in a mounted state of the disposable tube unit (140), the fluid inlet (142) is fluidically connected to the reservoir section (110) and the fluid outlet (144) is fluidically connected to the faucet.