Our older Keurig started acting up and spitting coffee around, sometimes with grinds. Tried the hot water and vinegar route, it helped for a couple of days, but then went back to acting up. Got these, the price was much lower than other descalers, and it came in a pack of 2. They really do work! Fixed my keurig to working like new, and no weird after taste. I did rince the water compartment a few times and ran just hot water through it to flush anything left out. Very happy with these, and I only needed to use 1 of the 2 bottles. I'm sure this will work on any coffee maker, regular or 1 cup.
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