A container comprising : two substantially L-shaped, unitary first corner structures , each first corner structure comprising a first panel and a second panel joined along a vertical corner to form a single unitary L-shaped structure, the first panel extending from the vertical corner to a first distal edge , the second panel extending from the vertical corner to a second distal edge ; two substantially L-shaped, unitary second corner structures , each second corner structures comprising a first panel and a second panel joined together along a vertical corner to form a single unitary L-shaped structure, the first panel extending from the vertical corner to a first distal edge , the second panel extending from the vertical corner to a second distal edge ; wherein: the vertical corners , are solid, continuous corners; the first and second corner structures , are joined to each other along convoluted seams located between the vertical corners , ; and a substantially rectangular base having two pairs of diagonally opposing corners , wherein the base is joined to the first corner structures and the second corner structures , characterised in that the base has a perimeter that nests within grooves defined by each of the first corner structures and each of the second corner structures , the grooves extending from the first distal edge to the second distal edge of each of the first corner structures and from the first distal edge to the second distal edge of each of the second corner structures . two substantially L-shaped, unitary first corner structures , each first corner structure comprising a first panel and a second panel joined along a vertical corner to form a single unitary L-shaped structure, the first panel extending from the vertical corner to a first distal edge , the second panel extending from the vertical corner to a second distal edge ; two substantially L-shaped, unitary second corner structures , each second corner structures comprising a first panel and a second panel joined together along a vertical corner to form a single unitary L-shaped structure, the first panel extending from the vertical corner to a first distal edge , the second panel extending from the vertical corner to a second distal edge ; wherein: the vertical corners , are solid, continuous corners; the first and second corner structures , are joined to each other along convoluted seams located between the vertical corners , ; and a substantially rectangular base having two pairs of diagonally opposing corners , wherein the base is joined to the first corner structures and the second corner structures , characterised in that the base has a perimeter that nests within grooves defined by each of the first corner structures and each of the second corner structures , the grooves extending from the first distal edge to the second distal edge of each of the first corner structures and from the first distal edge to the second distal edge of each of the second corner structures . the vertical corners , are solid, continuous corners; the first and second corner structures , are joined to each other along convoluted seams located between the vertical corners , ; and a substantially rectangular base having two pairs of diagonally opposing corners , wherein the base is joined to the first corner structures and the second corner structures , characterised in that the base has a perimeter that nests within grooves defined by each of the first corner structures and each of the second corner structures , the grooves extending from the first distal edge to the second distal edge of each of the first corner structures and from the first distal edge to the second distal edge of each of the second corner structures . <EOS>