I have a pattern, but can't find it. It was commercial (Simplicity or McCalls) and I made a couple, but it was years ago. You basically make a cover and lining about the same size as the tub. Here's the secret: the outside cover has a seam on 2 sides, as opposed to a single piece of fabric joined to the bottom circle. The handles on the tub will pop off. You make the outside cover, leaving an inch or so of the side seams open. Sew the top of the lining to the top of the outside cover, leaving the bottom circle of the lining off. Take the handles off the tub & insert it. Whip stitch the bottom of the lining on and reattach the handles. You can add pockets to the lining and/or the outside. Also you can sew a tube of fabric, turn it and put it over the handle to dress it up. If you make the tube about 3X the length of the handle, it will look ruched. Don't know if this helps at all....