The Keurig is the GREATEST invention EVER!! I use my Keurig everyday. Every. Single. Day!! Several times a day at that. With that said; when you go through K-cups as fast as I do they get really expensive!! Seriously, do the math; the single serve coffee pods can run up to $50 a pound. Check out the Cup Verdi, a refillable K-Cup for Keurig.  This is a cute little green refillable coffee filter that is 100% reusable. I’m now buying my regular ground coffee; my favorite coffee at that AND saving money!! Most of the single serve pods aren’t bio-degradable; so my solution is even good for the planet. This filter…