Mason jar/coffee sleeve by Schnoogly
Home & Decoration
Strip quilted cup cozy for a wide mouth jar.
This one is a gift and I'm also including one of the new "cuppow" reusable spouts that go with these jars. This is a new product that is made locally here in New England and I LOVE mine. http://cuppow.com/
The top and bottom are fold-over elastic I got at Joanne's. It used to be really hard to find that stuff! But now that they sell cloth diaper supplies they have several packages of it. That stuff sure wasn't sold there when I was sewing cloth diapers.
You could also easily make this to fit your standard starbuck's or other paper coffee cup and stash it in your purse.