| 摘要 |
<p>A container made of a synthetic resin in which, even when the cap is turned, air-tightness of the container is maintained until the cap has been turned by a predetermined angle and also a cap-opening angle is stabilized. A bottle-like container main body (2) made of a synthetic resin is structured such that the upper end portion of the outer periphery of a mouth portion (4) is formed as a smooth sealing surface (8) having no parting line formed on it and no surface unevenness over the entire periphery. Even when the cap is turned, the sealed state can be maintained until the cap is turned by a predetermined angle, so that the air-tightness of the container is secured sufficiently.</p> |
