| 摘要 |
PROBLEM TO BE SOLVED: To provide a cap device that produces a vacuum within a bottle.SOLUTION: A cap device includes: an upper cap in which a passage is formed; a lower cap which is connected to the upper cap by a separable system; a tubular member which is drilled into the lower cap and which is partially arranged inside the passage when the upper cap is connected to the lower cap; and a vacuum producer which is installed in the upper lid, which includes a side tube part fluid-connected to the passage, which is arranged in such a manner as to allow passage of a liquid and which sucks and discharges gas from the passage by the side pipe part. |
