Once your longer piece is ruffled you are going to center it on top of the right side of one of the 3.5 x 12 inch pieces of fabric and pin it into place. Sew it on with any stitch you like (I prefer the look of a zig zag stitch) making sure to go down the center over top the stitch line you just made while ruffling it.
Now to put the cozy together. You will need to do this step in very careful layers so make sure you pay attention!
Your layers will go like so…insul-fleece at the bottom, then ruffled 3.5 x 12 inch piece of fabric right side up, then at one end you will place your hair elastic with just a bit sticking out over the edge, then you will place the other 3.5 x 12 inch piece of fabric right side down. You’ve got yourself one heck of a cozy sandwich happening now, don’tcha.
Alright, so next you are going to sew all around the sandwich using a 1/4 inch seam allowance leaving the end opposite the hair elastic open. So, if you are looking at the picture above, you will start sewing at the bottom right corner across to the bottom left corner, then up to the top left corner (backstitching a few times over the hair elastic, and then sewing across to the top right corner. The complete right side will remain open for turning the cozy right side out.
Clip your corners, making sure not to clip the seams you just sewed up! Then turn your cozy right side out using the opening we did not sew together. You may need a chopstick to push out the corners.
The last thing we need to do is place the cozy over a mason jar and pull the elastic to see where you will need to place the button. Place a pin in that spot so when you take the cozy off you will have the area marked. Hand sew your button in place and you are done!
And totally functional…the best kinda project!
PS. You can also add another button onto the cozy so that these will fit the narrower Starbucks-type coffee cups…I love a multi-functional piece, don’t you!