UNIVERSALLY COMPATIBLE: These eco friendly premium k cups are universally compatible with Keurig 1.0 2.0 brewers. Fits most Keurig Brewer models: K15, K31, K40, K44, K45, K50, k55, K60, k65, K66, K70, K75, K77, K79, K100, K135, K140, K300, K350, K400, K450, K460, K500, K550, K560, B31, B40, B44, B50, B60, B66, B70, B71, B76, B77, B79, B100, B140, B200, and the following machines: Elite,Classic, Ultra, Special Edition, Ultimate, and Platinum. Does not work with paper filters. SAVE YOUR MONEY: The suit included 12 packs and each one can use many times. With our refillable k cup coffee filters, you can stop buying disposable K Cups that made out of paper or lower quality plastic Our k cups will help you minimize brewing accessories expenditures, allowing you to get more out of your blend purchases, all the while helping you remain environmentally conscious, too HIGH QUALITY: The cups are made from high quality materials, BPA free plastic and stainless steel, which is also dishwasher safe Free with a food grade stainless steel mesh. One-piece design with stainless steel high heat resistant mesh system. Helping produce the best brews you ever had Our ridge-less design on the inside also makes cleanup a breeze. Eco Friendly SAFE: Refillable k cups are not only excellent for you and your personal enjoyment, they are also extremely helpful to our planet. Help reduce your carbon footprint by reusing your refillable k cups all while enjoying your favorite coffee. Our ridge-less design on the inside also makes cleanup a breeze.