What is the only item that can be reused in a self-service situation?

In a self-service situation, beverage cups are typically the only item that can be reused. This is because beverage cups, especially those used for dispensed drinks, can often be rinsed or cleaned easily between uses, making it safe to reuse them for different customers.

In many food safety guidelines, items that come into direct contact with food, like plates and utensils, often pose a higher risk for cross-contamination and cannot be reused between customers without proper washing and sanitizing. Similarly, serving trays, while necessary for carrying food, can also harbor bacteria if not cleaned properly and are therefore not considered for reuse in a self-service context. The practices around using beverage cups reflect a balance between convenience and safety, allowing for efficiency while following health regulations.