Abstract: A packaging for a liquid filling with a product packaging pouch made out of a liquid-tight and elastic material and having a reaction chamber pouch made out of a liquid-tight and elastic material. The reaction chamber pouch is completely closed, and is arranged inside the product packaging pouch and partially filled with a first reactant. An inner pouch made out of a liquid-tight and elastic material is completely closed, is arranged inside the reaction chamber pouch and exhibits a predetermined breaking point that yields when its interior pressure is increased, and is filled with a second reactant. The first and second reactant induce a temperature change upon coming into contact with each other. As a result, a temperature change can be initiated by the user on the one hand, while minimizing the risk that the filling will become contaminated with chemicals on the other.

Abstract: A method for controlled temperature change of substances, in which the course of an endo- or exothermic reaction of one or several reactants in aqueous solution, which is in direct or indirect contact with the substances, is influenced using galenic methods is disclosed. At least one of the reactants is present in a solid form and is at least partly included in a galenic matrix. The galenic matrix is at least partly in a form such as tablets, granules, prills, pellets, rods or combinations thereof. The galenic matrix is differently strongly pressed and/or agglomerated in at least one of different regions and different parts. Also disclosed is a galenic matrix containing at least one solid reactant and methods of using such a galenic matrix.