when I make 'quick' ones, I do not use batting. But, I will often back them with a flannel so they are a bit thicker and do not slip. This keeps them thin enough that a wobbly wine glass set on the edge will not tip. But I always topstitch (with a decorative stitch in about a 1/2") and usually do a couple lines somewhere around the center (depending on the print) so they stay nice after washing. I only use batting and quilting on ones that are used more for decorative use than for practical use. I do use a very thick batting for runners to be used for Christmas scenes because the decorations sitting in them looks nicer in the fluffiness. Again, if you are selling them, you need to consider your time, effort and costs - can you cover it and make a profit?