Flexible container (1, 1', 1", 1"') which, in the opened state, is intended to adopt a cubic and/or one-sided or two-sided pyramid-like shape, suitable for receiving, transporting and storing bulk materials, with at least three lateral surfaces (11, 11', 11", 11"'), which jointly enclose a filling space around a filling axis, which filling space is or can be closed off at the top and at the bottom by respective base surfaces, an interface or as a junction point of the lateral surfaces (11, 11', 11", 11"'), 1.1 at least one edge connection means per side edge (6.1') is fastened on at least one lateral and/or base surface of the container and at least one inner connection means is fastened in the inner region, and/or 1.2 stretch connection means serving as suspension means extend along in each case at least one longitudinal surface line (6.2) of at least two opposing lateral surfaces of the container, completely or interruptedly over at least approximately their complete edge lengths, and 1.3 connection means are provided, which 1.3.1 on the one hand are configured for fastening the container (1, 1', 1", 1'") in the opened state on a frame, and/or 1.3.2 on the other hand serve as traction means in order to bring the container (1, 1', 1", 1"'), which is still empty and laid flat, into the opened state with one movement, and/or 1.3.3 in order with one movement to bring the emptied container (1, 1', 1", 1'"), still in the opened state, back into a flat state, characterised in that a crease structure is introduced into at least one of the lateral surfaces (11, 11', 11", 11"'), wherein a targeted thinning of parallel warp threads of a fabric which produces a crease structure is introduced into at least one of the lateral surfaces (11, 11', 11", 11", 1.1 at least one edge connection means per side edge (6.1') is fastened on at least one lateral and/or base surface of the container and at least one inner connection means is fastened in the inner region, and/or 1.2 stretch connection means serving as suspension means extend along in each case at least one longitudinal surface line (6.2) of at least two opposing lateral surfaces of the container, completely or interruptedly over at least approximately their complete edge lengths, and 1.3 connection means are provided, which 1.3.1 on the one hand are configured for fastening the container (1, 1', 1", 1'") in the opened state on a frame, and/or 1.3.2 on the other hand serve as traction means in order to bring the container (1, 1', 1", 1"'), which is still empty and laid flat, into the opened state with one movement, and/or 1.3.3 in order with one movement to bring the emptied container (1, 1', 1", 1'"), still in the opened state, back into a flat state, characterised in that a crease structure is introduced into at least one of the lateral surfaces (11, 11', 11", 11"'), wherein a targeted thinning of parallel warp threads of a fabric which produces a crease structure is introduced into at least one of the lateral surfaces (11, 11', 11", 11", 1.3.1 on the one hand are configured for fastening the container (1, 1', 1", 1'") in the opened state on a frame, and/or 1.3.2 on the other hand serve as traction means in order to bring the container (1, 1', 1", 1"'), which is still empty and laid flat, into the opened state with one movement, and/or 1.3.3 in order with one movement to bring the emptied container (1, 1', 1", 1'"), still in the opened state, back into a flat state, characterised in that a crease structure is introduced into at least one of the lateral surfaces (11, 11', 11", 11"'), wherein a targeted thinning of parallel warp threads of a fabric which produces a crease structure is introduced into at least one of the lateral surfaces (11, 11', 11", 11",