I purchased these to work with the new K coffee maker and I was told they would work.  Nope, they are set for the later models.  I was told to go to you tube to find out how to make them work.  You have to take the insert for the commercial k-cups out and then they are supposed to work.  I have not done this yet as I am not that great at doing things like this.  So members of my family will do it for me.  I highly suggest that the coffee maker comes with directions for easy conversion.  I know that the company wants to sell their insert coffee, etc but I like my green tea and herbal teas which are not available especially since I mix the herbal myself.