I have and use daily my Mini Keurig, which is great for an individual cup of coffee, hot tea, hot chocolate, Iced Tea or Iced Coffee, or even a cup of hot water (which I use for tea bags). You can also get pod containers for filling with your own ground coffee or loose tea. Very versatile really, but you do pay a price for the comfort of making 1 cup at a time (actually a choice of 6, 8, or 10 ounces. The larger (taller) Keurig's will handle taller mugs/cups, which the mini cannot.
Support bacteria. It's the only culture some people have.