Why You'll Find A Plastic Ball Inside Every Guinness Beer Can - Tasting Table
Briefly

The Guinness widget was patented in the U.K. in 1972 but wasn't produced in cans until 1988 and in bottles in 1989, allowing beer lovers to enjoy their favorite drink outside pubs. Surprisingly, in 1991, the widget triumphed over the internet as the best technological marvel of the past 40 years, winning the Queen's Award for Technological Achievement, showcasing its significance in the world of brewing and consumer enjoyment.
Guinness reinvented the sludgy somewhat unpalatable porter style into a more refined drink with a higher alcohol content that could hold up to the rough seas of transport by ship. This pivotal change not only secured a favorable reputation for the brewery in the late 18th century but also paved the way for Guinness's transformation into an iconic stout brand that would dominate the market.
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