What was the original geometric shape that inspired Ruben Rausing when he invented the revolutionary Tetra Pak packaging system in 1951?

Packaging innovations have transformed how products reach consumers, combining functionality, sustainability, and marketing. Few innovations have been as revolutionary as the Tetra Pak, which fundamentally changed beverage preservation and distribution. This poll tests your knowledge about this groundbreaking invention that transformed the global food supply chain and created new possibilities for product shelf life and distribution.

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A tetrahedron (four-sided pyramid)
A hexagonal prism
A cylinder with sealed ends
A rectangular cuboid with diagonal seams