Reusable K-Cup coffee filter exclusive to the Keurig Home Brewing System. It allows the user to use their own gourmet or specialty coffees in the brewer. It is in three pieces.. the outer part that the filter fits into and then the screw-top lid. You put your coffee into the filter or a special loose tea or tea bag into filter and screw on the lid and put it into the brewer. Push down the handle and begin the process. It cleans easily and can be used over and over again..
This little contraption is a must own, especially if your favorite coffees are not available as k-cups. The biggest problem with most k-cups is that they do not contain enough coffee to make a strong standard size mug-full. I use it with Starbucks coffee. If you fill the filter basket to the top (or nearly the top), you will get MUCH stronger tasting coffee. I use standard auto drip size grinds. If you make sure to screw the cap on it, it will not leak or let grinds into your coffee mug. I honestly do not understand how anyone can have problems with such a simple item. It is simple and quick to clean. If you are using it for more than one person, buy an extra set of filters. Fill it to the top and enjoy.