| 摘要 |
A bottle stopper comprising a cap and a skirt portion extending from the cap. The skirt member comprises: a flange arranged on the skirt member; a first slit extending from the lower end of the skirt, which is spaced from the cap, to a point on the skirt between the lower end and the cap; and a second slit extending from the lower end of the skirt to a point on the skirt between the flange and the lower end of the skirt. The second slit is bordered by first and second edges, each comprising a protuberance. A method of packaging a pharmaceutical substance comprising the steps of: filling a bottle with the pharmaceutical substance; inserting the inventive bottle stopper into the top of the bottle.
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