I only drink one cup of coffee a day at most and my wife hates coffee, so rather than brewing even a small 4-cup pot, I'd rather not waste anything and just do the one cup at a time that my Keurig offers.

In other words, not only am I being environmentally responsible by not using throwaway pods, I'm also not wasting a bunch of coffee and paper filters using a traditional drip machine just to get my one cup every morning.