I thought I would share it with you.
I used a silk shirt that was starting to show a little wear, but the fabric was otherwise in good condition.
I cut two rectangles 11×14 inches. I sewed side seams wrong sides together, then right sides together to create an extra strong hidden seam. Then I did the same for the bottom.
I cut the button side of the button placket from the shirt and sewed it to the top of the bag to create a drawstring casing. I made two buttonholes through which I threaded some ribbon for the drawstring.
I hope Annie likes it.