Fill N Save 2 Pack Reusable Carafe Filters. Reusable coffee filter for the Keurig 2.0, K200, K300, K400, K500 Series of Machines Roll over image to zoom in Fill N Save 2 Pack Reusable Carafe Filters. Reusable coffee filter for the Keurig 2.0, K200, K300, K400, K500 Series of Machines