Abstract: A film roll container is disclosed of the type having mating receptacle and cover portions. The portions have facing laterally extending central spindles for rotatably supporting opposite ends of a film roll when the cover portion is mounted on the receptacle portion. The portions further have securing means comprising a plurality of spaced-apart first and second mating frusto-conical bosses. The first boss has a flat end portion having an annular recess such that the end portion in cross section is W-shaped. The second boss has an axial V-shaped cavity in the end thereof such that the second boss defines a projection of W-shaped cross section which is nestable in light-tight relation within the annular recess.