PURPOSE: To make the cooling or heating easier by a method wherein a means to cool or heat by a trigger motion is encapsulated in an encapsulating container which is formed of a base member and a film shaped member and the film shaped member is fitted to be joined to the can bottom.

CONSTITUTION: A base member 2 is formed of a material with high insulating property, elasticity and friction resistance, such as polyethylene foam, etc., and a film shaped member 3 is formed of a flexible sheet with excellent heat- transmission, heat resistance and tenacity, e.g. a cloth, etc., to constitute an encapsulating container 1. Then, a temperature regulating unit 10, for which a cooling means to generate endothermic reaction or heating means to generate exothermic reaction by a trigger motion such as hitting, etc., is encapsulated to make a cooling or heating tool A. Then, a film shaped member 4 is made into a shape which is sittable to a bottom plate part 22 of an aluminum can with an opener, B, etc., and an adhesive surface 4 is provided on the surface, and covered by a release paper 5.