Interesting history!

http://thesocietypages.org/socimages/2015/04/10/the-story-of-the-shopping-cart/

Without enormous carts, Big Box discounters and wholesale club stores couldn’t exist. You can’t carry a box of 50 packages of Ramen noodles, 36 rolls of toilet paper, a box of 3 gallons of milk, enough soup for the entire winter, and a DVD player you just found on sale around without a huge cart.