| 摘要 |
<p>The object of the invention is to provide an advantageous insert to be put in a container for a drink under pressure in order that, when the container is opened, matter is released from the insert into the drink to modify the nature of that drink. The insert comprises a vessel having a hollow part (3), closed at one end and open at the other, slidably and sealingly engaged within the open end, a plunger part (8) and valve means permitting only under certain relative pressure conditions inside and outside the vessel egress of matter from the vessel or ingress of matter into the vessel.</p> |
