A freight container includes a tank (10) mounted in an inclined manner between a pair of end frames (12) by means of connecting structures (11) each of which contains an end ring (20) and further connecting elements (21) The end rings (20) are eccentrically secured to spherically curved end bottom portions (25) of the tank (10) in such a manner that at one tank end the respective end ring (20) is offset upwardly and at the other end offset downwardly. The further connecting elements (21) connect the end ring (20) to the respective end frame (12). Due to the combination of the spherically curved bottom end portions (25) of the tank (10) with the circular end rings (20), the freight container may be readily assembled with any desired tank inclination.