I made this with used inner tube and I folded the inside with fabric.
MATERIAL: _used inner tube;
Step 1: SEW INNER TUBE AND CUT IT
Sew inner tube together (use some oil on the upper part of the inner tube to allowed a better running of the sawing machine), cut a big rectangle for the body of the purse and two little square for the sides. You can use another beauty case bag for template or made one of paper for have a right pattern.
(See also my instructables "tips for sewing bike inner tube").
Step 2: PIN FABRIC TO INNER TUBE
Pin the fabric to the inner tube.
Step 3: SAW THE ZIPPER TO THE MAIN RECTANGLE
Saw the zipper to the main rectangle, take out one by one the pins while sawing.
Step 4: ADD a LITTLE PIECE OF INNER TUBE ON THE SIDES OF THE ZIPPER
Add a little square or oval piece of inner tube on both sides of the zipper (closed), for eliminated every open space.
Step 5: SAW PIECES TOGHETHER
Saw pieces together inside out, take out pins while sawing.
On a side of the zipper you can saw a short piece of street bike inner tube (picture 2)
Step 6: YOU ARE DONE!
you are done! enjoy!