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Real Life Flash, Stomach Cancer, Hole in Coffee Bag

Curiosity Weekly

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The One Way Valve: How It Can Save Your Coffee

Coffee is best if you brew it a couple days after the roast is finished. A company called Wozhin who produces about 200,000 of these things every day for coffee bags and other things. The valve isn't just saving your coffee from exploding, it's saving your next cup of coffee.

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