Portugal makes 40 million cork wine stoppers a day. We visited a cork forest to see how they’re made.

Cork has been used as a wine stopper for centuries and is still the stopper of choice for a large majority of top-quality wines.  These corks come from the outer layer of the oak tree, which eventually grows back. Portugal is a primary producer of the material. It has the largest cork oak forest by area in the world. Visit Business Insider’s homepage for more stories.

The process of harvesting the cork

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