Name (also cork pores or cork warts) for the lenticular or even round air-permeable pores in the bark (outermost layer) of woody plants, which allow the gas exchange between the atmosphere and the living tissue. The cork lying under the bark is interspersed by lenticels in the form of corridors for this mass transfer (water and gas). The fewer lenticels in a bottle stopper cork are present, the better the quality. On the one hand, the cork is thereby denser and on the other hand, in the lenticelic ducts contaminants or bacteria be stored, resulting in taste impairment and dreaded corked can contribute. In the past, lenticels were elaborately cut out by hand in the production of high-quality products. Today, however, this is no longer possible due to industrial production.