This is an instructable on a fabric/cardboard box that i saw at some store and knew I needed to make one. Its great for organization because when you don't put stuff in them than they fit practically anywhere. All you have to do is unzip the bottom and it completely flattens out.
NOTE: I didn't take pictures while building it unfortunatly, I just completely forgot. However, I did take pictures of the end product and the tools and materials.
Step 1: Materials and Tools
-Fabric(of your choice
Step 2: Layout and Cutting
The nice thing about this project is you can make them whatever size you want as long as you keep it a rectangle or square. So layout your design onto your cardboard and cut out your 4 pieces for the walls, and you don't need a piece of cardboard for the bottom. Next cut out your fabric piece for the sides, but be sure to make it a bit bigger than the cardboard pieces. It will be two fabric pieces that cover the cardboard pieces sides.
Step 3: Sewing
Now that you have all your pieces cut it's time to start sewing. I used heavy duty upholstery thread just for added durability. Now make a seam at every corner to keep the cardboard pieces separate from each other. You should now hem the bottom of the rectangle and then slip in your cardboard pieces in their own compartment. Then hem the top to seal them in. You should now have a rectangle with no bottom that is easily collapsable.
Step 4: Bottom and Zipper
Now cut out your bottom piece for your rectangle and then cut it diagonally. Then for the zipper sew it into the diagonal cut you just made. Then sew your rectangle onto your rectangle bottom. Test to make sure it all works and you're DONE !