About Us

Innovators Behind G2G: Engineering the Future of Eco Wine Closures

At the core of G2G lies a shared vision—to reimagine wine preservation with a closure that marries sustainability, performance, and precision. Our founding team brings together decades of research, product innovation, and engineering excellence. Together, they’ve pioneered the Glass-to-Glass (G2G) closure, a cutting-edge solution crafted for modern winemakers seeking toxin-free, eco-conscious alternatives to corks and plastics.

Our partners aren’t just business minds—they’re inventors, engineers, and problem-solvers with a deep understanding of real-world application. From laboratory testing to field trials with boutique vineyards, their combined expertise has shaped a closure that is already reshaping global expectations in wine packaging.

G2G Team

The Visionaries Behind G2G: Crafting the Future of Sustainable Wine Closures

Terry Tremayne – inventor of the G2G glass wine closure and expert in sustainable packaging innovation

Terry Tremayne – Inventor & Research Scientist

Terry Tremayne is a trailblazer in product innovation, combining deep scientific rigour with a flair for applied engineering. With over 40 years’ experience in statistical analysis, software engineering, and research and development, Terry has built a reputation as one of Australia’s most forward-thinking product developers. After transitioning into new product development two decades ago, Terry turned his attention to sustainable packaging solutions. His work has led to several international patents—including the now-revolutionary Glass-to-Glass wine closure. His leadership experience includes holding directorships at two of Australia’s largest market research companies, giving him a data-driven edge in product viability and consumer insight.

David Manley – Product Visionary & Market Disruptor

David Manley is no stranger to industry disruption. As co-founder of APA, David led the charge in creating Australia’s most successful LPG gas cylinder manufacturing firm, ultimately securing an impressive 80% share of the market. His inventiveness didn’t stop there. David holds patents for a unique heat exchanger that transformed domestic hot water systems in the early 2000s—a testament to his ability to identify inefficiencies and engineer practical solutions. With over 40 years’ experience in product development and strategic marketing, David brings a seasoned commercial perspective to the G2G project. He is a co-patent holder for the Glass-to-Glass wine closure and plays a central role in bringing this innovation to the wine industry.

Dr. Kris Mastalerz – Mechanical Seal Expert & R&D Authority

Dr Kris Mastalerz brings elite engineering credentials to G2G. With a PhD in Mechanical Engineering and four decades of multidisciplinary R&D experience, Kris specialises in mechanical seals for both liquid and gaseous systems—a highly specific expertise that has proven essential to the success of the G2G closure. Kris has collaborated on numerous patented technologies, with his name listed as co-author on an impressive roster of innovations. His analytical precision, combined with deep knowledge of fluid mechanics, makes him an irreplaceable part of G2G’s technological backbone. His contribution ensures the G2G seal delivers airtight performance with unparalleled consistency—preserving wines exactly as their makers intended.

A Collaborative Vision for a Sustainable Wine Future

What unites Terry, David, and Kris is a shared belief: that the wine industry deserves closures that are as refined as the wine inside. Plastic caps leach. Corks taint. But glass-on-glass? It delivers purity, longevity, and elegance—without compromise.

G2G’s development has been meticulous, combining mechanical precision with scientific validation. The result is a closure that meets the demands of the most discerning winemakers and wine lovers alike. By challenging the status quo of traditional bottling, our founders are not just offering an alternative—they’re setting a new global benchmark.

If you’re a producer or investor looking to be part of the next big shift in wine packaging, we welcome you to join us on this journey.

Let’s Raise the Standard—Together

Whether you’re a boutique vineyard with a sustainable vision or a premium estate looking for unmatched closure performance, G2G represents more than just a product. It’s a movement led by minds who understand the science, respect the art, and believe in a better, cleaner future for the global wine industry.