Latest lid design, compatible with Keurig 2.0 and 1.0: K200, K250, K300, K350, K360, K400, K450, K460, K500, K550, K560, K15, K31, K40, K44, K44 5, 5, 5, 5 ,, K60, K66, K70, K77, K80, K100, B31, B40, B44, B50, B60, B66, B70, B77, B100, B140, B200, Stronger and Stronger: The reusable K cup is made of high-quality 304 meat mesh. With this reusable K cup's sturdy construction and tight-fitting lid, you're sure to taste delicious coffee like never before Easy to use and clean: The reusable K Cup is very easy to use, just fill the reusable K Cup with the coffee grounds you need, and after use just pour the grinds into the trash can and then clean it with water. Reusable k-cup filter. These refillable individual K-cups are dishwasher safe.