VAST COMPATIBILITY: Whether you are the proud owner of a first-generation Keurig 1.0 brewer, or have one of the latest Keurig 2.0 machines, these  K cups are reusable and made to work with any Keurig brewer, new or old! So even if you have two Keurigs at home, or a different machine at work, our reusable cups will help you enjoy your favorite brews, anywhere you might be! Cups fit any way you insert it, unlike other designs! And no need to swap out the Keurig filter holder