How can we slow down the transfer of heat energy? Our class tested various insulators and wrapped these materials around a plastic bottle containing warm water. These materials included aluminum foil, plastic wrap, bubble wrap, polyester batting, fleece, and a carpeting pad. The insulated bottles were places in gallon ziplock bags and then set in a tub of ice cold water. Temperature readings were taken at the start and after five, then ten minutes. Findings were compared and discussed.