At the Dusseldorf wine trade fair ProWein in March 2003 was certified by the experts of the closure option "glass on glass" is already an overwhelmingly high level of acceptance.
Kwa mvinyo Düsseldorf biashara ya haki ProWein Machi 2003 alikuwa kuthibitishwa na wataalamu wa "kioo kwenye kioo" kufungwa chaguo tayari ni mzigo ngazi ya juu ya kukubalika.