a water reservoir for a clothes pressing iron , the reservoir being composed of two plastic parts , and a method for fabricating the reservoir by : simultaneously molding the two parts of one reservoir in a first injection molding step in two impressions of the same mold ; and assembling the two parts together while , in a second injection molding step , injection molding a joint of plastic material between the two parts to connect the two parts together in a fluid - tight manner , wherein the two parts are assembled together and the second injection molding step is performed before complete crystallization of the two parts .