Abstract: A longitudinally-opening container having a faceted tubular body is disclosed. The tubular body is formed by splitting a tube longitudinally, or from a single sheet of paperboard folded to form two end openings. End caps that cover each end opening are split in half along a central axis, forming sections having confronting edges along the median axis and bounded on either end by respective sections of the end caps. The container opens longitudinally into two trays connected by a living hinge. The living hinge is formed by a taped seam or a longitudinal fold in the body. The living hinge aligns the confronting edges to engage releasable locking means on those edges when the container closes. The locking means holds all the edges of the container in substantial alignment with each other.