Abstract: A collapsible container made of a four-sided enclosure having two opposite panels foldable at their center and foldable relative to the two other opposite panels such that the enclosure may be collapsed by folding inwardly the two foldable panels. One unfoldable panel is hingedly attached to a tray in which the bottom of the erected enclosure is disposed and the collapsed enclosure is capable of laying flat in the tray after pivoting around the hinged structure attaching the non-foldable panel to the tray. A lid or cap is also provided for capping the enclosure when in an erected configuration ready to be filled with articles and for covering the tray containing the collapsed container enclosure. Preferably, the tray is mounted on the top of a pallet.