Which groundbreaking packaging innovation from the 1950s revolutionized vaccine distribution by solving the 'cold chain' problem in developing regions?

Packaging in scientific products has evolved tremendously over the years, not just for aesthetic purposes but for functionality, preservation, and sustainability. From laboratory equipment to pharmaceutical products, innovative packaging solutions have helped advance scientific research and product efficacy. This trivia question tests your knowledge about a revolutionary packaging innovation that changed how a critical scientific product reaches consumers.

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The Vaccine Vial Monitor (VVM) - a heat-sensitive label that changes color when a vaccine has been exposed to heat for too long
The HexaCore container - a six-layered insulated box that maintained constant temperature for up to 72 hours
The CryoSeal system - a vacuum-sealed glass container that prevented temperature fluctuation
The ThermoShield wrapper - a reflective foil packaging that repelled external heat sources