Rubber bungs and stoppers are used in many industries and sectors across the world, not least in laboratory and research settings. Ley Holdings are one of the leading manufacturers of rubber bungs. Based in Liverpool in the UK, we not only provide a catalogue of existing products but can develop new designs for your business if you require a bespoke solution. Rubber bungs are generally used to seal bottles, tubes and other containers. In many cases, these stoppers are designed to be airtight. In others, particularly in research facilities, they may have a hole in them to allow a tube to feed from one container to another, for example, when distilling liquids.