What is one reason pouring out remaining liquid is essential?

Pouring out remaining liquid is essential primarily because it helps to comply with safety regulations. Many regulations are focused on the safe handling and disposal of liquids, especially in the context of food and beverage service. Adhering to these safety standards is important to prevent contamination and ensure the health and safety of both customers and staff. By correctly handling liquids and disposing of them when appropriate, establishments can reduce the risk of spills and accidents, which could lead to injuries or health code violations.

While other considerations like saving space, reducing waste, and ensuring customer satisfaction are important in service, they do not carry the same weight in the context of regulatory compliance. Safety regulations are designed to protect people and maintain standards within the food and beverage industry, making this reason a priority in onboard service practices.