Thermally-insulated vessels, e.g. flasks, jugs, jars {comprising additional heating or cooling means, i.e. use of thermal energy in addition to stored material comprising heat or cold producing means, i.e. energy transfer from outside the vessel}
Thermally-insulated vessels, e.g. flasks, jugs, jars {comprising additional heating or cooling means, i.e. use of thermal energy in addition to stored material comprising heat or cold producing means, i.e. energy transfer from outside the vessel}