Allows the use of any coffee in your Keurig Coffee Machines. Use your favorite coffee in every cup - pick the flavors and quantity you prefer. Specially designed filter paper ensures oils and sediments don't end up in your coffee. Paper filters are 100% Biodegradable and lessen the environmental impact versus traditional plastic k-cups. Saves up to 80% over the cost of pre-filled single-serve capsules. Makes a smoother, more balanced cup of coffee. Compatible with almost all reusable Keurig K-cups.