Guinness beerPhoto: Simon HuckoJust in time for St. Patrick’s Day, scientists at the University of Limerick have developed a biodegradable alternative to that plastic widget that keeps Guinness foamy.

It turns out that coating the inside of the can with biodegradable, natural cellulose would do an even better job of putting nitrogen into the beer (which is what the plastic balls are for — nitrogen is used to make stout bubbly). So on some future St. Patrick’s Day, even your beer could be wearing green.

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New Technology Creates a More Eco-Friendly Head on Your Guinness,” GOOD

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