Bulk container assembly

Collapsible bulk container (1), in the form of a pallet container, for the transport and storage of fluent and particle goods, which container (1) includes a carrying base member (2) which is provided with skids (20), collapsible side walls (3), preferably a so called liner in the form of a bag shaped inner layer and a removable lid (5), whereby the side walls (3) are moveably attached to the base member via hinges and that adjacent side walls (3) locks together mechanically, wherein the lid (5) is provided with an outer rim (51) and an inner rim (52) while two first opposite side walls (31 and 32 respectively) are provided with coupling means (35) protruding perpendicularly from the outside face of said first side walls (31 and 32 respectively) and being arranged adjacent to the vertical edges of said first side walls (31 and 32 respectively) and two opposite second side walls (33 and 34 respectively) are provided with coupling rims (36) arranged perpendicularly on the rear face, along both vertical edges of said second side walls (33 and 34 respectively), that receiving coupling means (36′) are arranged on the inside face of said coupling rim (36) protruding parallel to the rear face of said second side walls (33 and 34 respectively) and which receiving coupling means (36′) are intended to interact with said coupling means (35) of said first side walls (31 and 32 respectively), that the rear face of said second side walls (33 and 34 respectively) are further provided with recesses (37) adjacent to the two vertical edges while the vertical edges of said first side walls (31 and 32 respectively) are provided with heels (38) which heels (38) are intended to interact with said recesses (37) and that the outer rim (51) and inner rim (52) of said lid (5) are arranged so that they limit any inwards and outwards movement of erected side walls (3) when said lid (5) is assembled on said side walls (3).