Loskutnikov/RobHainer/WarrenPrice/littleny/Shutterstock/TheAtlantic“I don't have one. They're kind of expensive to use,” John Sylvan told me frankly, of Keurig K-Cups, the single-serve brewing pods that have fundamentally changed the coffee experience in recent years. “Plus it’s not like drip coffee is tough to make.” Which would seem like a pretty banal sentiment, were Sylvan not the inventor of the K-Cup.