What was bubble wrap originally invented to be used as before becoming a popular packaging material?

Bubble wrap is one of the most recognizable packaging materials worldwide, protecting fragile items during shipment. But did you know it was originally designed with a completely different scientific purpose in mind? Test your knowledge about this famous accidental innovation that changed product packaging forever and became a staple in laboratories and scientific equipment shipping.

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A textured wallpaper for home decoration
An insulation material for greenhouse walls
A floating platform for offshore laboratories
A cushioning material for space shuttle components