If you have a small bathroom window, live in a cold region and need a lined window treatment, use pillowcases! Simply cut two slits in either end of the folded area of the case and slip a rod thru! You can use two or more, depending on the window width. Some cases come with lovely frills so a nice decorative flair is already there!! I've also used sheets for larger windows. A bit of sewing required but mostly hemmed already! And you can get sheets at dollar stores for cheap, cheap!! Just thought I'd share!!