Abstract: The extraction of caffeine from tea leaves, a classic experiment in university chemistry curricula, encompasses fundamental chemical operations and theoretical principles of natural product isolation and purification. This experiment also holds significant importance in secondary school education and examinations. In this study, we have developed an innovative heating apparatus utilizing flexible silicone rubber heating plates, a material commonly employed in the chemical industry. This novel device replaces traditional heating equipment, substantially enhancing experimental safety. Furthermore, we have designed a cost-effective and visually engaging caffeine sublimation apparatus using readily available materials, which demonstrates high experimental success rates. This apparatus is particularly suitable for educational demonstrations and experiments in regions with limited educational resources. Our experimental design, centered on engaging and interactive approaches, facilitates students' comprehension of fundamental chemical principles and experimental techniques. It also deepens their understanding of chemistry’s significance in modern society and fosters increased interest in the chemical sciences.

Key words: Caffeine, Sublimation, Engaging experiments, Science popularization, Teaching