A container for packaging and unwinding a welding wire comprising: a square cardboard box with four vertical side walls and four vertically extending corners, each defining an apex, a center cylindrical core, an inner vertically extending tubular liner with an octagonal outer shape having four outer walls, each generally overlying a side wall of the box and four alternate inner walls between two of the outer walls and spaced from the corner apexes to define generally triangular, vertical cavities with an at rest dimension from the apex of a corner to one of the alternate inner walls and a vertically extending corner reinforcing element in each of the cavities. The element in each cavity has a diagonal pressure rib extending from the apex to the inner wall.
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