Diagram illustrating heat transfer in a double-walled coffee cup with labels.

Key Elements for the Diagram Double-Walled Structure Draw the inner and outer layers of the cup, with a space in between to represent the vacuum or insulating material. Heat Transfer Arrows Use arrows to indicate the direction of heat trying to escape from the hot liquid. Use smaller, broken arrows to show how the insulation reduces this heat loss. Lid and Convection Prevention Include the lid to show how it traps heat and minimizes convection. Temperature Labels Clearly label the hot drink (e.g., 70°C) inside and the cold outside environment (-5.55°C). Key Terms Clearly label the insulation, conduction barrier, and convection suppression. See more