The invention provides a container of substantially form-retaining material, for instance aluminum, steel or other metal, or PET (polyethylene terephthalate) or other plastic, for a liquid, which must be provided prior to consumption with a foaming head, such as chocolate milk, cappuccino, milkshake, which container comprises: a circumferential wall; a base which is connected along its whole periphery to this wall or is integrally formed therewith; a cover which, after filling of the container with the liquid, is optionally arranged on the side remote from the base and which is connected to this wall along its whole periphery; and; a cartridge present in the container and in the filled and closed situation of the container at least partially filled with a gas under pressure serving as foaming medium in the wall of which cartridge is situated at least one continuous hole for passage of gas.