Final answer:
Unrefrigerated iced coffee typically lasts for 24-48 hours.
Step-by-step explanation:
Iced coffee typically lasts for 24-48 hours when left unrefrigerated. This timeframe is determined by several factors, including the temperature of the environment and whether the coffee contains any perishable dairy products. When exposed to room temperature, bacteria can grow rapidly in the coffee, potentially leading to spoilage and foodborne illnesses.