A video on 18th century women's clothing, showed decorative outer pockets, that could be worn under top layer of a skirt. They were fastened with ribbon around the waist.
Today we have fanny packs, coin belts... but this struck me as useful to start a trend, because everyone loves convenient storage. And their hands in their pockets.
Two large rectangles sewn together, with a slit in center of outer sides. Feed ribbon (elastic) through top edge. Each was purse-sized.
It could be a good solution for elderly, disabled, and children.