Prominent winery proprietor Geoffrey Grosset predicts that the use of screw cap tops will reach 200m bottles in Australia in the 2004 vintage now under way.

This would be a thousand fold increase from the 200,000 of the 2001 vintage and reflect the enthusiasm that now characterises the market for change.

Grosset is one of the Australian wine makers, based in the Clare Valley, who, with New Zealand counterparts, have spearheaded the switch from cork.