Guinness cans with plastic balls

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What are these little plastic balls in Guinness cans good for? Can they be a problem for recycling the aluminum? I´m donating the empty cans to an animal charity and want them to not have problems.

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They're widgets to add gas afaik to the beer as the can is opened. Guinness uses nitrogen rather than carbon dioxide to give its fizz, hence smaller bubbles and the delicious thick creamy head.

 

If in Germany you have a can you have paid a 25 cent deposit on it, I'd guess that's more than the value of the aluminium.

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Though difference between "recyclable" and "will be extracted and recycled".  But the widget will not cause a problem in the alumunium recycling process.

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16 hours ago, El Jeffo said:

Who needs Google when you have Malcolm Spudbury, right jeba?

 

It did take some willpower to not reply with a lmgtfy.com link.

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