How does a snack vending machine ensure the freshness and quality of its products?

A snack vending machine typically employs various mechanisms to maintain the freshness and quality of its products. For example, some vending machines use refrigeration to keep perishable items such as sandwiches and drinks at the right temperature. The vending machine's temperature sensors ensure that the temperature remains within the acceptable range. Additionally, vending machines are often equipped with automated rotating mechanisms that ensure the oldest items are dispensed first, reducing the chances of selling expired or stale products. Furthermore, vending machine operators periodically restock the machines to ensure that the products are fresh and in good condition.