Made these little coffee cozies for some friends of mine. They were birthday gifts, but would be great for teacher Christmas gifts. I used the tutorial at House on Hill Road.
Here's the inside view of the cozies.
You should make some too. I made 4 in about 2 hours.
I had made one before and I worked really fast, but really they are pretty quick little projects.
You'll just need to have fabric and some batting on hand.