India, June 16 -- A transparent cup that's strong, sustainable, and actually vanishes in the ocean? It might sound like a stretch in our plastic-heavy world, but it's very much a reality thanks to a team of Japanese researchers who are reimagining the future of packaging, one cup at a time.

For decades, the beverage industry has relied on glass or plastic to show off the vibrant colours of their drinks. Glass looks great but breaks easily and costs a pretty penny. Plastic is cheap and convenient, but its environmental toll is written across beaches and oceans worldwide. The world has been waiting for a material that combines the best of both: clarity, strength, and sustainability, without the baggage.

Enter the new transparent paperboar...