Abstract: A portable heating and cooling apparatus and method of using the same wherein a temperature-set material is secured in a housing with both rigid and expandable sides. The housing is placed within a container which is so configured such that there is little or no disruption of the contact between the rigid surface and an object to be heated or cooled, whether such contact is direct or via some thermal conductive material.

Abstract: The present invention relates to a heat/temperature preserving pack. Embodiments of the heat preserving pack include a soft pack or a hard box pack, having an inner containing space filled with phase change isothermal substance. The present invention maintains the temperature of objects for an extended period to achieve a constant temperature effect. By implementing the present invention, the size and weight of the heat preserving container is effectively reduced and the space available for storing objects to be heat preserved is increased. Thus, the heat preserving container is convenient to carry and the transport cost is reduced.