The feed trough container (10) has a base portion (10a) having a bottom (11), side wall (12) and an edge (14a) on the side wall. The inner surface of the bottom and the inner surface of side wall form an enclosed interior space (Z). An inwardly protruding projection (14b) is formed in the region of edge on the side wall relative to the adjacent inner surface of the side wall interior and is extended along the edge.
