Why Tea in kettle cools slowly but fast in cup?

Tea in a kettle cools slowly due to its larger volume and the insulating properties of the kettle material, which helps retain heat. In contrast, tea in a cup has a smaller volume and greater surface area relative to its volume, allowing heat to dissipate more quickly into the surrounding air. Additionally, the cup's material often has less insulation than the kettle, further enhancing the rate of cooling. Thus, the combination of these factors results in faster cooling of the tea in a cup compared to that in a kettle.