in fig1 to 4 , the outer container is denoted generally by 1 , and the inner containers which are arranged adjacent to one another in parallel in said outer container 1 are denoted by 2 , 3 and 4 . the inner containers are cylindrical tubes , preferably composed of high - grade steel . the outer container 1 which surrounds said inner containers with a spacing can thereby have a flat design . said outer container 1 is substantially a flat cuboid whose side surfaces may be rounded . in any case , however , said outer container has two planar wall parts 10 , 11 . for thermal insulation , a vacuum prevails in the space 5 between the inner containers 2 , 3 , 4 and the outer container 1 , which vacuum , together with further measures , forms a so - called “ super insulation ” arrangement . as a result of the vacuum in the space 5 , the planar wall parts 10 , 11 are pressed together by the atmospheric pressure . on the other hand , the inner containers 2 , 3 , 4 are pressed outward even with atmospheric pressure prevailing in them . if the cryogenic liquid in the inner containers 2 , 3 , 4 is stored at a relatively high pressure , the tensile loading of the cylindrical walls and of the bases 7 , 8 of the inner containers 2 , 3 , 4 is correspondingly greater . to absorb the compressive forces acting on the planar wall parts 10 , 11 of the outer container 1 , said wall parts 10 , 11 are supported with respect to one another by supports 12 , 13 . as can be seen in fig4 , said supports 12 , 13 connect the two planar wall parts 10 , 11 , with said supports 12 , 13 extending between the inner containers 2 , 3 and 3 , 4 , preferably without coming into contact with the latter . in fig2 , the supports 12 , 13 are individual supports . the inner containers 2 , 3 , 4 can , in a known way , be suspended on the side walls 14 , 15 by means of suspension arrangements 17 , 18 , which are known per se , at both sides . the modified embodiment of fig5 and 6 differs from this in that the supports 22 , 23 extend over the length of the inner containers 2 , 3 , 4 and in that the inner containers 2 , 3 , 4 are fastened only at one side , by means of heat - insulating feet 32 , to an end wall 33 of the outer container 1 , and are freely movable with their other end . as can be seen in fig5 , the supports 23 , 24 are i - shaped profiles whose foot parts 24 , 25 bear at the inside against the planar walls 10 , 11 and whose web parts have reinforcement ribs 26 in order to increase their buckling resistance . with the inner containers 2 , 3 , 4 arranged at a sufficient distance , said inner containers 2 , 3 , 4 may be wrapped in carbon fibers 30 embedded in a plastics matrix in order to withstand high internal pressures while having the lowest possible weight . in a similar way , the outer container 1 may also be composed of a very thin metal sheet if it is likewise provided with fiber - reinforced wrapping 31 . fig7 and fig8 illustrate a further possible embodiment of a container according to the invention for cryogenic liquid . here , the container has an outer container 40 with a length l , a width b and a structural height h . the further possible embodiment according to fig7 and fig8 differs from other embodiments in that the support 34 has two separate , elongate support elements 35 and 36 which are arranged the along longitudinal axes 37 of the inner container 38 , that is to say in the longitudinal axis direction . here , fig7 shows a section of the support along the plane through the two longitudinal axes 37 of the inner containers 38 . by adding the lengths of the cross sections of the support elements 35 and 36 in the longitudinal axis direction , it is found that the outer container 40 is supported between its base wall 41 and its top wall 42 over more than 50 % of its longitudinal extent by the support 34 . it can also be seen that the longitudinal extent ( along the longitudinal axis of the cylindrical inner container ) of the support is , in cross section , a multiple of the width extent of said support . to determine the length extent or the width extent , the maximum length dimensions or maximum width dimensions of the cross section of the individual support elements , arranged in each case between two inner containers , are added . portions of the cross section of the support elements which overlap in the direction of the longitudinal axis or in the direction of the width ( section with the plane through the two longitudinal axes 37 ) are counted only once in said addition . in fig8 , it can be seen that the support 34 has an additional reinforcement 39 in the region of the base wall and of the top wall of the outer container 40 . in this way , the mutual introduction of force between the outer tank and the support can be improved . in fig7 and fig8 , it can be seen that , in the illustrated embodiment , the cumulative extent of the cross - sectional area of the support 34 in the direction of the longitudinal axis is significantly greater than in the direction between the inner containers and at right angles to the longitudinal axis , that is to say in the direction of the width of the outer container 40 . the outer container 40 is illustrated in each case only schematically in fig7 and fig8 .