Working people, school children, and others pack meals to take with them that will be eaten later in the day, however there may not be access to refrigeration or the capability to heat their food. Students will design and build a lunchbox that will maintain two different temperatures in different sections of the lunchbox. Students will survey their classmates to inform them about the needs of the lunchbox users and measure the area and perimeter of lunchboxes and common foods or items included in their lunches. Students will research the thermal conductivity of various materials and apply their findings within their design. Student designs will be tested using thermometers to measure change in temperature over an extended time period.