Abstract: The invention relates to a pack (100) for the preparation of a food or beverage product comprising an insert (10) and a container (20), the container (20) being configured by at least one flexible sheet folded in such a way to configure a container where the ingredients for the food or beverage product are stored, the water to extract and/or infuse and/or dissolve and/or reconstitute the ingredients in the container (20) and to prepare the food or beverage product being introduced through the insert (10) through an injection hole (11) and into an inlet chamber (191), the food or beverage product once prepared being also dispensed through this insert (10), the pack (100) presenting a generally plane shape and being essentially vertically oriented during food or beverage production with the insert (10) arranged at the lower side of the pack (100) so the water is supplied into the volume of the container in an upward direction; such that the pack (100) further comprises an inlet channel (30) arranged at the inle