Which two countries are known for championing screw-cap closures?

Australia and New Zealand have significantly championed the use of screw-cap closures in winemaking. This movement began in the 1990s as a response to issues such as cork taint, which can spoil wine due to the presence of TCA (trichloroanisole) in natural corks. Winemakers in these countries recognized that screw caps provide a reliable seal that prevents oxygen ingress and protects the wine from spoilage, thus ensuring the integrity of their products.

The adoption of screw caps also aligns with the modern trends of sustainability and innovation in winemaking. Many winemakers in Australia and New Zealand have successfully demonstrated that screw caps can preserve the flavors and aromas of the wine, maintaining the quality until it is opened by the consumer. This has influenced international perceptions and acceptance of screw caps beyond these regions, leading to wider adoption in other countries over time.

The other choices contain regions that typically follow traditional practices with cork closures, often placing a higher value on the perceived tradition and aging potential associated with cork. While many regions are beginning to explore alternative closures, the strong advocacy and early adoption by Australia and New Zealand set them apart as leaders in the use of screw caps.