Every time we weigh up which bottle of wine to buy, we hold the fate of nightingales, rare black storks, secretive wild cats and one of the world's most remarkable trees in our hands. It has all to do with the stopper. If it is cork, it probably came from the bark of one of the ancient cork oak trees from the Montados, in the Alentejo region of Portugal.

The show’s own verdict is on its page.