An employee drink must have which of the following?

The correct choice emphasizes that an employee's drink must be in a closed container. This requirement is crucial for maintaining hygiene and safety in environments such as food service establishments. A closed container helps prevent contamination from airborne particles, spills, or foreign objects, thereby protecting both the employee and the food products being handled.

Additionally, this practice is often regulated by health and safety standards, which mandate that any employee beverages not interfere with food preparation areas and minimize the risk of accidents or cross-contamination. While options like a lid and straw or labeling may have their own contexts, they do not address the fundamental need for a closed container that secures the drink effectively.