I own a Keurig. I bought a extra filter, one for coffee of my choice grounded, save a fortune. and the basic holder I put a teabag in holder and let it filter thru, a better tea then placing in cup. They are ready to use whenever you have a urge. I Love It. Goes on trips with me too. tip...when filling filter with a scoop of coffee...the first cup is strong, I run again and both top off my commuter mug and perfect flavor. Kids will make hot water for instant oatmeal.