I bought a Keurig Vue coffee maker at a great price, but not knowing hte standard k-cups would not work. The Solofil v2 filler cup fixes that. It supports 1) use of your personal ground coffee; and 2) use of the standard Keurig k-cups. It works great for both! We are now REALLY enjoying our new Keurig Vue thanks to the Solofil v2.