Natural wine corks originate from the bark of the cork oak tree, a species uniquely adapted to regenerate its thick outer layer. Harvesters carefully strip the bark at intervals, usually every nine to twelve years, without harming the tree. Once removed, this bark supplies the raw material for cork, prized for its elastic structure, microscopic air pockets, and natural sealing ability. Because the tree continues to produce new bark throughout its long life, the material remains renewable and tie