Birth of the Shopping Cart The first rolling shopping cart was created by a Piggly Wiggly owner in Oklahoma City. Once a regular basket got too heavy, customers headed straight for the check-out line.  This robbed stores of incremental sales. So in 1936, that store owner introduced a rolling cart to make shopping easier. In CRO terms, he reduced the friction of shopping to increase average order size. The design went mainstream in the 50s. It has remained a retail “best practice”…