| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily remove an inner lid by upward thrusting of a sheath tube while detachment of the inner lid during storage is suppressed.SOLUTION: An extraction cap 5 is provided with: a cap body 14 provided with a barrel part 16, a top-end part of which attaches to a mouth 4A of a bottle container 4, and an air supply tube 17 standing from a bottom portion 16B of the barrel part and forming a first flow channel 8; and a sheath tube 15 arranged and retained on an exterior of the air supply tube 17 to slide up and down. An inner lid 18 is fitted on a top-end part of the air supply tube 17. An annular first retaining protrusion 33 extending in the circumferential direction is formed on an external peripheral surface of the air supply tube 17, and a second retaining protrusion 34 retained by the first retaining protrusion 33 and comprising a plurality of retaining protrusions 34A arranged at intervals in the circumferential direction is formed on an internal peripheral surface of the inner lid 18.</p> |
