bung
A bung is an apparatus used to seal a container, such as a bottle, tube or barrel. [1]
A stopper especially for the hole through which a cask, keg, or barrel is filled or emptied. [2]
Some chemistry bungs may also include one or more holes so a glass tube or laboratory funnel may be inserted through the bung and into the container or another piece of apparatus. [...] The rubber bung may be used to seal a flask because the user may require the contents to be mixed via shaking the flask or may require that the contents be kept inside the flask and prevented from leaking out. [1]
Note: click on a word meaning below to see its connections and related words. [3]
Unlike a lid which encloses a container from the outside without displacing the inner volume, a bung is partially inserted inside the container to act as a seal. [...] They have been supplanted by laboratory glassware which come with standard ground glass joints which allow the pieces to be fitted together easily. [1]
To close with or as if with a cork or stopper. [2]
The most common every-day example of a bung is the stopper of a wine bottle. [1]
The orifice in the bilge of a cask through which it is filled; bunghole. [4]
Ground glass joints are also much more resistant to solvents and chemicals used. [...] Please help improve this article by adding citations to reliable sources (ideally, using inline citations). [1]
It’s inserted into the bung hole, through which wine can be added or withdrawn. [...] A jug with a cork bung. [3]
Custom parts for Rock Crawlers and buggies at a great price! [4]
Sources:
[1] Bung - Wikipedia, the free encyclopedia
[2] bung - definition of bung by the Free Online Dictionary, Thesaurus and …
[3] bung: Definition from Answers.com
[4] bung definition | Dictionary.com