Final answer:
Decaf coffee stored in a thermal pot should ideally be consumed within 4 to 6 hours for optimal flavor and safety, even though it may remain hot for several hours.
Step-by-step explanation:
When storing decaf coffee in a thermal pot, the shelf life is primarily dependent on how long it can maintain a good taste and safe temperature to prevent bacterial growth. While the coffee's flavor and aroma compounds remain after using supercritical CO₂ decaffeination methods, once brewed, coffee should ideally be consumed within a few hours. A thermal pot can keep coffee hot for several hours, but it does not stop the gradual loss of flavor or the risk of bacteria multiplying if the coffee is stored for too long. After sitting in a thermal pot for more than 4 to 6 hours, even though it may remain hot, the flavor quality significantly drops, and it is generally recommended to brew a fresh pot for the best taste and safety.