| CPC B65D 65/403 (2013.01) [B32B 29/005 (2013.01); B32B 29/08 (2013.01); B65D 5/3692 (2013.01); B65D 5/64 (2013.01); B32B 2439/62 (2013.01)] | 21 Claims |

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1. A knock-down-flat cylindrical shipping box comprising:
a circumferential wall including an outer surface and an inner surface, the circumferential wall being configurable in a flat configuration and a tubular configuration, when the circumferential wall is in the tubular configuration the inner surface defines an inner cavity for an item-to-be-shipped to be placed therein and forms a top-end opening and a bottom-end opening;
a top cap attachable to the circumferential wall in the tubular configuration to close the top-end opening; and
a bottom cap attachable to the circumferential wall in the tubular configuration to close the bottom-end opening,
wherein the circumferential wall is formed of a packaging material that includes a plurality of base portions, the inner surface being formed by the plurality of base portions,
wherein, in the flat configuration, adjacent base portions of the plurality of base portions are spaced apart from each other and a gap is formed between the adjacent base portions, and
wherein, in the tubular configuration, the adjacent base portions are brought closer to each other than in the flat configuration, reducing the size of the gap between the adjacent base portions.
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