You are so correct about using a redwork design. The problem with quilting in the liner is the holes it makes. That is where you lose your insulation properties. When I do heat or cold I quilt it to another layer of batting and before I close it I put in the insul-brite or other insulating material.
What about a redwork design? Maybe you have one of those that is suitable.
Does your sewing machine have some nice stitch that would work? I have used a simple tiny heart, a diamond and a swirl that way. Or sew straight or wavy lines.
Not really, but I do have an eyelet. I will look into it more closely. Thanks for the tip :)