In an age when you can get just about anything online, it’s probably no surprise that you can buy a diamond-making machine for $200,000 on Chinese eCommerce site Alibaba. If, like me, you haven’t been ...

On a chilly February afternoon, I stood at my kitchen counter packing precisely measured ground coffee into a $3,000 Lelit Bianca, hoping to master the art—and science—of making impeccable little cups ...