I used Yahoo and entered the search terms -
quilted mug carrier that opens to be a mug rug It took me until page 3 of the responses to find what I think you are looking for.
Is this it?
http://www.burdastyle.com/projects/c...ie-and-mug-rug
This is a neat one. I'm going to keep a copy of this pattern. OOPS! The pattern is no longer found online. I am searching the RedBrolly website for it now. At least you have a picture of what you may be looking for.
http://www.freequiltpatterns.info/fr...ly-mug-bag.htm
There are some iron carriers out there, that fold up to carry a hot iron, and then unfold for you to iron on. That might be more what you are looking for. The Quilting Board has this thread
http://www.quiltingboard.com/main-f1...ay-t58640.html or this thread
http://www.quiltingboard.com/main-f1...y-t179441.html