I was fascinated when I first learned about objects which have a centre of mass outside themselves.
Today’s invention is a system for carrying a lot of shopping that exploits this kind of geometry.
It consists of a C-shaped trough carried using a pair of padded shoulder straps. This allows a shopper to stand inside the C and thus support the weight of the goods. It also allows reaching for stuff with both hands and with none of the arm strain associated with a heavy basket.
Items of shopping could be placed in this, as a substitute for a hard-to-steer shopping trolley, and then carried home in it (with a suitable zip-on weather cover).
Ths would provide some exercise, as well as an indication during shopping of the weight of goods which would have to be carried home (or hoisted into a car).