Whatever your thoughts are on how the perfect cup should be made, for nearly 50 million homes in the US (and not counting the many more in offices), Keurig is coffee. For almost 30 years, we’ve been trained to ditch the old drip-coffee maker for disposable single-serve pods. But now, Keurig wants us to leave (eventually) the K-Cup and embrace the AltaRounds pod, a compostable, compressed coffee round that works the same: Drop it into the machine, press a button or two, and out comes joe. During a presentation in New York City, Phil Drapeau, Keurig’s senior vice president of Future Coffee Systems, said customers wanted more than brewed coffee. They wanted to make fancy espresso drinks, from simple cappuccinos to salted caramel concoctions I sampled at the event (PSL fans, rejoice). But to do so, Keurig needed to invent an entirely new system. “We wouldn’t be able to do any of that with K-Cup,” Drapeau says. “It will fail. You have to brew it at the right temperature and extract. You can’t be constrained …