I have a non-Keurig K-cup machine. The trick with K-cup machines, is to either use a reusable K-cup, or use one of the affordable non-Keurig alternative brands.
I use San Francisco Coffee Company’s “Fog Chaser” as my usual cup. They don’t HAVE a K-cup, they have a sealed ring-and-bag combo. . .
This is the first brand I found that worked in a K-cup machine, but was not packaged and distributed by Keurig. Since, Keurig has come up with K-cup 2.0. It incorporates a sensor that detects a specific type of coating on the top of the K-cup which was intended to make non-Keurig K-cups fail in the new machines. I ordered a box of 120 cups from San Francisco Bay Coffee Company just this week and it arrived with a clip to attach to a K-cup 2.0 machine to defeat the sensor! The battle rages on. Gotta love capitalism.