If you've been enjoying any of the World Cup matches over the last several days, you've likely seen a new addition to the referee's arsenal: a spray-on foam. And if you're not a soccer expert, you've probably wondered where it came from.
If you've been enjoying any of the World Cup matches over the last several days, you've likely seen a new addition to the referee's arsenal: a spray-on foam. And if you're not a soccer expert, you've probably wondered where it came from.
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