Shop tricks: This is how the shopping cart design entices you to buy in bulk. Supermarkets use psychological tricks that encourage people to spend more.
The design of a shopping cart is not a coincidence, but is intended to encourage purchase. Many carts have additional compartments to prevent small items from falling out. There are usually two plastic pieces attached to the rear end of the cart that cover the corners. They help ensure that the return of the car is as quiet as possible. It's not just on the cart - there's also trickery involved in sorting the store.