The present invention relates to a packaging assembly , which can separately store the substances to be mixed such as drugs, and is used for mixing the said substances during use, and which essentially comprises at least one chamber, which has an opening in the form of an aperture on one side thereof, and which is intended for storing the substances that are to be mixed; at least one separating wall , which extends from the inner base of the chamber to the opening of the chamber or is disposed at the part located between the base of the chamber and the opening of the chamber , and which separates the chamber into at least two parts; a cap , which is used by being attached onto the chamber, and which has a hollow inner part so as to be used for mixing and as a cup.