Originally Posted by vivoaks
My daughter showed me this several years ago. I've used it on the inside of a bottle holder I made. The bottle of cold water sits down inside it, and the cold water stays cold longer, and it doesn't sweat out into the fabric, so the outside fabric stays dry.
Sounds like it might be a great addition to mug rugs. Put a layer between the batting and backing to prevent the sweating glasses from soaking the mug rug and making a mess on your tables!