A collapsible container with four side panels (15,16,17,18) all permanently connected to a base (1) by links (11,41) allowing the panels (15,16,17,18) to be moved between an upstanding condition on the base (1) where they are retained by engagement of bottom panel flanges (40) with channels (13,14) on the base (1) and can be coupled by coupling means (19,23) releasably secured by securing means (21,22) thereby to form an enclosure and allowing the container to be collapsed by folding down the panels (15,16,17,18) into an overlying relationship.