Drinking Tea is not just about quenching thirst, tea enthusiasts have high standards for both tea leaves and tea wares. The water should ideally be from a mountain spring, the tea leaves should be the tips, and as for the kettle, it's best if it's an old iron kettle. Thus, there are no shortages of news stories about people paying large sums to acquire old iron kettles. Besides their value for collectors, old iron kettles are also said to offer health benefits. It's rumored that an old iron kettle has superior heat retention compared to other kettles, which can increase water temperature, soften the water quality, and release divalent iron ions. The water, originally ordinary, becomes healthy and rich in iron ions with these additional iron ions. Moreover, the divalent iron released when the iron kettle heats up can interact with the tea, supplementing iron to the human body.