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, tooHIGH QUALITY: These Keurig k cups are made from high quality materials, 100% BPA free plastic and stainless