(under subclass 660) Receptacle wherein the wall structure includes means (e.g., fold lines, corrugations, etc.) which permit the receptacle to assume a configuration of reduced dimension or to be compressed into compact form when empty.
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6, for a knockdown receptacle wherein the walls are hinged so as to be folded into and out of a nonuse configuration.
907, for a Cross-Reference Art Collection of beverage cans having collapsible wall structure.