To me it feels like a cross between flannel and felt. I just tried looking up the fabric content of a Crown Royal bag online but they aren't telling...
I think about a year or so ago MSQC showed a picture of a Crown Royal quilt they did for someone on their longarm. I've seen the bags selling in lots...
The K-cups work really well for me because I'm pretty much the only one that drinks coffee at the house and I have at most 2 cups a day and some days...