Greenco Compatible With Keurig K-Cup Coffee Machines (4 Pack), Black 4 K-cup compatible with most K- cup machine brands Save money with this reusable K-cups as it is a fraction of the cost of ordinary K-Cups No mess easy to use just rinse it out when finished Fill with your favorite brand coffee or tea at your desired strength Not affiliated with Keurig or K-Cups, both registered trademarks of Green Mountain