Patent ID: 8518693

Claim:
A transportable holding container comprising: an outer container configured to house a culture vessel and a plurality of containers therein, a heat storage material constituted so as to undergo a liquid-to-solid phase transition at a given temperature inside each of said plurality of containers, and a plurality of agitator tools disposed so as to be in contact with the heat storage material for stirring up the heat storage material inside said plurality of containers, wherein each of said plurality of containers contains at least one of said plurality of agitator tools, wherein the agitator tools are freely movably embedded in the heat storage material so as to stir up the heat storage material by freely changing their relative positions in the heat storage material solely by movement of the container in which each is contained during transport without using a drive device, wherein the ratio A/B for the maximum diameter A of the agitator tool and the maximum diameter B of its container oriented vertically, for at least one of said agitator tools in each of said plurality of containers, is 0.3≦A/B≦0.75, wherein each of said plurality of containers has a heat propagation film, which conducts heat from the heat storage material to the culture vessel, having elasticity and configured to secure a position of the culture vessel by being stacked in the outer container, and wherein the culture vessel contacts the heat storage material through the heat propagation film.