One of the downsides of drip coffee makers is that they often can’t make just one cup of coffee - you generally have to brew a minimum of four cups, which can be frustrating if you live by yourself.

When you need a cup of coffee — but just one cup, not a whole pot — a Keurig can be the perfect gadget. But there are a lot of Keurigs out there, so which one is right for your needs? It turns out, a ...