How to sew a pocket zipper

i only recently started installing zippers this way but i think i like it; it can be really useful for making wallets and bags.

first start by applying interfacing to the outer fabric where you will install the zipper.  then mark a rectangle where you want the zipper to be.  the zipper i used for this is 4" and i marked a rectangle that is 4"x0.5".  then place the outer and lining fabric right sides together, and sew around the rectangle using a smaller stitch.  then clip the inside of the rectangle get the corners as close to the stitches as you can without actually cutting them.  flip inside out and press.  then line up and pin your zipper in place, and top stitch all the way around.

and that's it!  i used this tutorial to make this travel kit.  do you have any projects that could use an extra zippered pocket?