While the information about the freezer is interesting, I can't remember the last time I put a quilt in the freezer for any reason.
And, if you are using the pen to draw around a template, I would think that would wind up being cut off or on the edge of a seam allowance.
If the temp really has to be 14 degrees to revive, the wash water would have to be frozen, so I guess that's not too much of a problem, either.
I'd still like to try them.