Coffee is addicting. It is so addictive that people who are hooked on coffee can finish not just one cup but two or more cups. We all know what would happen when you drink more than one cup. You can probably say goodbye to sleep for a couple of days. This is the reason why I limit myself to only one cup every seating. Thus, I love my single cup coffee machine because I do not have any other choice but to drink that one cup. No more and no less.