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Whats the white ball in a can of guiness? watch

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    I assume it's somthing to make pouring it perfectly easy? Or is it just there to reduce the amount they have to put in each can? Or is it to force people to drink it out a pint glass and not out the can?

    I've always wondered lol.
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    I thought it was to prevent it going flat? Might be wrong.
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    widget.

    regulates gas pressure or something, i can't remember how the ******* works.
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    A widget.
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    Wow, this is really interesting. I always wondered this myself.
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    At first I thought it was a government tracking device, after 4 pints I thought that's how the cops found me while driving...
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    Yeah it's a widget.
 
 
 
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