a recyclable package for retail product contains two major parts : a receptacle section , containing a receptacle for the packaged product , and a tray section . the two sections are assembled and mechanically held together to form the package for the product , but are readily separated by a recycler . the two sections are formed of different kinds of packaging material , such as transparent plastic for one section and corrugated cardboard for the other . each section may be treated separately for recycling , making recycling of the materials possible .