Cut a strip of the outside fabric, sew to make a tube. Turn the tube right side out. Set aside.
Cut the inside fabric and outside fabric into the following pieces: A square the desired size (one of each type of fabric). A triangle that is half the desired size (two of each type of fabric).
On one side of the zipper sew a triangle of each fabric type with the fabric facing toward the right side of the zipper. Fold to turn fabric into the right orientation. Repeat with the other side of the zipper.
Layer the square cut outs with the inside fabric first then the outside fabric facing up. Fold the rub in half and lay the folded edge toward the center of the fabric in the desire position. Place the fabric with the zipper in the center face down onto the square fabric. Make sure the zipper is partially opened.
Sew around the edge to create the square pouch. Turn project right side out through the zipper.
Edge with decorative stitching as desired.