A container comprises a container body for containing contents to be heated or cooled, a thermic module at one end of the body, and a closure at the other end of the body. Within the thermic module, an internal exothermic (or, alternatively, endothermic) chemical reaction is initiated to heat its contents...http://www.google.fr/patents/US7117684?utm_source=gb-gplus-shareBrevet US7117684 - Container with integral module for heating or cooling the contents
Container with integral module for heating or cooling the contents