The Keurig Reusable K-Cup filter provides an inexpensive alternative to K-cups and allows you to use all your favorite blends. It is also very easy to use.1.Make sure you remove the original K-cup holder from the machine first so that you are ready to drop in the reusable filter when it is ready.2. Fill the reusable filter with your favorite blend and place it in the reusable holder.3. Screw on the top and drop it in.The only downside is that it is inconvenient to clean in between each cup when you are making multiple cups in a short period of time.