Furoshiki is a Japanese wrapping cloth used as a carry-all for nearly everything under the sun. This graphic shows just a few of the ways the furoshiki can be folded and twisted to carry boxes, books, bottles, and more. It seems like a wonderful technique to learn.
According to the Wikipedia entry, there is not one set size nor material to furoshiki cloths, so grab your hankerchief or washtowel and start saving plastic bags. (The only good suggestion I have heard for buying a made-to-order furoshiki is one that has the above graphic printed on it.)
The above graphic is direct from the Japanese government, which has been encouraging the use of furoshiki instead of other more wasteful solutions.