Supermarket lockers generally use bar codes, coin-operated, and WeChat, but their cost functions are different.
Barcode type lockers are definitely cheaper, you need to use printing paper, so it is neither environmentally friendly and the cost will continue to increase.
Coin-operated and WeChat cabinets are worthy of choice in terms of long-term cost or environmental protection.
But now most supermarkets use bar codes. If you can buy a locker, you can only buy bar codes. If you have a budget, you can purchase WeChat cabinets. Now many supermarkets use WeChat cabinets.