| 摘要 |
A bottle cap including an additive holding unit which is supported in a mouth of a bottle has in a lower portion thereof an opening for discharging the additive, and is open at the top. An open-and-shut unit is seated to be coaxial with the additive holding unit and moves up and down to open or shut the opening. An outer cap unit includes a sealing tube which is placed between the open-and-shut unit and the additive holding unit and performs a sealing function. A skirt having a forgery preventing function is integrally provided on a lower end of the outer cap body. A delay hook retains the skirt for a period when the opening is opened, thus delaying separation of the skirt.
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