Backbag / Bag

If you forget your bag while shopping usually you have to take the bags the shops offer you. But they are not that comfortable, if you want or have to use your hands. You have problems opening the door or picking something up.
The Backbag is a plasticbag that you can also get at the counter, but with a little twist you can use it as a backpack, too. It is usable everywhere, where people are shopping.