How, exactly, did I end up on the roof of a coffeehouse in Tokyo, kneeling over a single-burner camp stove and something called a Whirley Pop? Sweat soaked my T-shirt as the wind kept blowing out the ...

Coffee lovers have been known to go to some impressive extremes for a cup o’ joe and there are a million tools, gadgets, and gizmos to help you brew the perfect beverage. But here’s a concept that ...