The only zipper I had that was long enough was purple and I had some sewing themed swatches that were not quite compatible colour-wise, but I was determined to make it work. So, did I succeed?
Perhaps you can decipher "Quilting is Fun!" on the side?
The other side I used a fabric square with some worlds about sewing and a few cats. Just up Grandma's alley!
Here is the top. With the uneven purple strips it looks like the zipper was sewn in asymmetrically.
Have a delectable day!