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 any of the following machines: Elite,Classic, Ultra, Special Edition, Ultimate, and Platinum. Does not work with paper filters. SAVE YOUR MONEY: This 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 all Keurig brewing accessories expenditures, allowing you to get more out of your blend purchases, all the while helping you remain environmentally conscious, too HIGH QUALITY: These Keurig k cups are made from high quality materials, 100% BPA free plastic and stainless steel, which is also 100% 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.