A few years ago I invested in a reusable K cup. I did this after switching from brewed coffee to a Keurig machine. The reusable and fillable cup was attractive for a number of reasons. One ...

Cost. In the long run, you'll save the most with the reusable K-cup adapter. The costs we cite below include one cup of coffee daily brewed with beans bought for an average of $10 per pound.

Making a good cup of coffee really comes down to the beans, and if you have a pod-style coffee maker that relies on K-cups, ...