How Cork is Made 


This is a close-up of a piece of bark. It’s quite thin, and won’t be used to produce high-quality natural cork. But now there are also technical corks, made up of small pieces of cork fused together, which means that more of the cork bark is suitable for producing wine bottle closures.
– How cork is made: an illustrated guide

Cork is something you don’t really think about, but the process is fascinating.