Want to add a hidden zipper pocket to the lining of a bag? Here's how!
1. Cut two rectangles of fabric to just larger than the size of your finished zipper pocket.
3. Place the marked rectangle on your bag lining where desired, with right sides facing, and pin in place all around the drawn rectangle.
6. Pull the pocket lining through the slit, and press.
10. Finish sewing your bag as desired.