Bevelled / Rounded end In order to study, develop, project and to construct a cork stopper, it is necessary to have a deep knowledge of all raw materials. An innovative system, an intense research and a careful quality control during the production process of the cork, that besides being a noble, inert, innocuous and raw material resistant to time, it needs also a selection, supervision and know-how for a perfect functioning in the production systems as well as in the bottling and opening of a wine bottle.