Easy project that you can adapt for bigger sizes, use as a sandwiche bag. This one in particular is for your used cloth pads, after you change them, (if you are at work for example).
What you will need
How to do this project
Place the polyurethane side with the right side of the fabric
If you use pins, make sure to be on the edges or if may ruin the polyurethane (leak resistant). Sew all around leaving only a small part open so you can turn to the right side. Cut the 4 edges
Turn to the right side. Close the part that was still opened with a straight stitch.
First use the tool to make a little hole to mark the place that you will place the press stud