I bought this so I wasn't using so much plastic for the tiny k-cup pods after receiving  a Keurig Mini for Christmas. I followed all the instructions to try installing both with the adapter and with the adapter removed and it does not fit in the K-mini. I know I was following directions correctly and I watched the video that shows how to install, but it does not fit the mini. So much for a "universal"...Now I hardly use the Keurig at all since I don't like all the plastic waste and I enjoy getting my coffee grounds from a local store.