A 燜燒罐 (thermal cooker or vacuum flask) is a highly efficient kitchen tool designed to retain heat for extended periods, allowing food to cook or stay warm without a direct heat source. This innovative container has gained popularity among busy professionals, travelers, and health-conscious individuals who seek convenient and energy-efficient meal preparation methods. How Does a ... https://www.tigerhkeshop.com/pages/thermal-food-jar-lunch-box