New High Tech Bag Holds Your Goods
Walk into Family Mart and you may walk out with the latest high tech or low tech bag, depending on how you look at it.
Presumably it's much easier and lower cost to merely cut a piece of square material.
Photo 2 shows the fabric material texture similar to polyester and the oval-shaped cuts.
Photo 4 shows the two sides grasped and being raised, and the position of the weight in the center relative to the sides and the shape of a bag being formed. This may look similar to a Fresnel lens.
Photo 5 shows the bag ready to be carried.
DIY Your Own Bag
You can DIY your own bag with a flat piece of polyester and a scissors. Just cut out the indicated pattern in photo 2.