<p>A sealing cap (3) has two or more rotation prevention sections (3d) vertically extending downward from an end surface on the opening end side of the cap (3) so as to be symmetrical about the center axis of the cap (3). The rotation prevention sections (3d) each have a recess (3e) formed at substantially the center in the width direction of the rotation prevention section (3d) and open on the front end side of the rotation prevention section (3d). A flange (2c) is provided at the boundary between a base (23) and a pouring tube (22) of a pouring section body (2), and engagement projections (2b) are formed at predetermined positions on the flange (2c). The engagement projections (2b) are adapted to fit into the recesses (3e) in a manner parallel to the direction in which the rotation prevention sections (3d) vertically extend downward. The construction minimizes unnecessary rotation of the sealing cap (3) and enables a user to easily determine that sealing is completed.</p>
