Abstract: A tank pack comprising a box-shaped body with a bottom and defining a housing, made from cardboard, and a sack made from plastic for containing liquids, purees or similar products suitable for being housed in the housing is described. The sack is provided with at least one outlet valve and one inlet valve. The outlet valve is connected to a cardboard support base of the sack that comprises a base sheet suitable for being arranged laying over the bottom. A front wall of the body is provided with an opening to externally expose the outlet valve. The support also comprises a front sheet foldably connected to the base sheet. Anchoring means are provided for the outlet valve and suitable for internally laying over the front wall of the body. A manipulation and fastening flap is foldably connected to the front sheet so as to be accessible near or at the upper end of the body.