Which chocolate company first introduced the concept of 'flow wrapping' technology that allowed chocolate bars to be sealed in-store while maintaining freshness, revolutionizing chocolate retail in the 1930s?

The chocolate industry has seen remarkable innovations throughout history, with certain breakthrough products changing how we enjoy this beloved treat. Behind many iconic chocolate bars are fascinating stories of product design, marketing genius, and sometimes even accidental discoveries. Test your knowledge about a revolutionary chocolate product that changed the confectionery landscape forever!

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Cadbury with their Dairy Milk bars
Rowntree's with their Kit Kat bars
Hershey's with their milk chocolate bars
Toblerone with their triangular chocolate bars