I test a lot of coffee machines. Like, a lot of them. The Ratio Four is the small-batch brewer I use to try new kinds of coffee. Coffee is the original office biohack and the nation’s most popular ...

Any old coffee maker can whip up a quick cup of java, but if you want to get a bit more mileage out of your morning brew, a smart coffee maker is a wise investment. Not only do smart coffee makers ...