A lid arrangement (20) comprises first and second lids (22) for use in a container (12) comprising a wall arrangement (16). Each lid (22) is movable between open and closed positions. Each lid (22) comprises opposite first and second edges (124, 126), and a plurality of rib formations (132) extending transverse to the aforesaid edges (124, 126). When the first and second lids (22) are In the closed positions, the rib formations (132) of the first lid (22) overlap the rib formations (132) of the second lid (22), so that each rib formation (132) of the first lid (22) extends parallel to, and alongside, a corresponding rib formation (132) of the second lid (22) to provide a line of support (S) that extends across the lid arrangement (20) from the first edge (124) of the first lid (22) to the first edge (124) of the second lid (22).