A device for storing, transporting, and dispensing a liquid, comprising: [a] an outer container formed by a panel made of sheet material, comprising: [i] a plurality of longitudinal folding lines extending in the longitudinal direction of said panel and separating in said panel side faces of said container, [ii] a plurality of first transverse folding lines extending in a transverse direction of said panel to form first flaps in said panel, [ii] said panel being foldable over itself along said longitudinal folding lines, such that in the assembled state of said device, a hollow prism having a closed polygonal cross-section is formed, [b] an inner bag comprising a tap for dispensing said liquid, said bag being arranged inside said outer container in said assembled state of said device, and [c] said tap having retention means so that, in said assembled state, said tap is immobilized with respect to said container, [d] said device further comprising at least one front cover made of sheet material and having a shape complementary to the inner contour of said prism, said at least one front cover having at least two assembly flanges projecting from the sides of said at least one front cover, and [e] said at least one front cover having a preformed area and in said assembled state, said tap being housed in said preformed area of said at least one front cover through said retention means, characterized in that [f] in said assembled state, said first flaps are folded along said first transverse folding lines towards the inside of said outer container, such that in said assembled state, said first flaps are arranged inside said prism, parallel to the inner face of said prism to form a front end of said container, and in that [g] some of said flaps have first holes spaced apart from said first transverse folding lines, said first holes being configured such that, in said assembled state, said at least two flanges of said at least one front cover fit in said first holes, said at least one front cover being recessed with respect to a plane passing through the respective front edge of said container and a reinforcing lip having a depth being formed between said plane and the front face of said front cover. [a] an outer container formed by a panel made of sheet material, comprising: [i] a plurality of longitudinal folding lines extending in the longitudinal direction of said panel and separating in said panel side faces of said container, [ii] a plurality of first transverse folding lines extending in a transverse direction of said panel to form first flaps in said panel, [ii] said panel being foldable over itself along said longitudinal folding lines, such that in the assembled state of said device, a hollow prism having a closed polygonal cross-section is formed, [i] a plurality of longitudinal folding lines extending in the longitudinal direction of said panel and separating in said panel side faces of said container, [ii] a plurality of first transverse folding lines extending in a transverse direction of said panel to form first flaps in said panel, [ii] said panel being foldable over itself along said longitudinal folding lines, such that in the assembled state of said device, a hollow prism having a closed polygonal cross-section is formed, [b] an inner bag comprising a tap for dispensing said liquid, said bag being arranged inside said outer container in said assembled state of said device, and [c] said tap having retention means so that, in said assembled state, said tap is immobilized with respect to said container, [d] said device further comprising at least one front cover made of sheet material and having a shape complementary to the inner contour of said prism, said at least one front cover having at least two assembly flanges projecting from the sides of said at least one front cover, and [e] said at least one front cover having a preformed area and in said assembled state, said tap being housed in said preformed area of said at least one front cover through said retention means, characterized in that [f] in said assembled state, said first flaps are folded along said first transverse folding lines towards the inside of said outer container, such that in said assembled state, said first flaps are arranged inside said prism, parallel to the inner face of said prism to form a front end of said container, and in that [g] some of said flaps have first holes spaced apart from said first transverse folding lines, said first holes being configured such that, in said assembled state, said at least two flanges of said at least one front cover fit in said first holes, said at least one front cover being recessed with respect to a plane passing through the respective front edge of said container and a reinforcing lip having a depth being formed between said plane and the front face of said front cover.