a bag structure of a thermoplastic film material comprising front and rear bag walls connected by side walls and having an open mouth top portion , said open mouth portion being characterized by having handles located at opposite end regions thereof , said handles being of two films as a result of being integral extensions of said front , rear and gusseted side walls ; said bag having a bottom wall planarly extensible so as to form a rectangle with at least no substantial excess film outside of the bulk volumetric capacity of said bottom region of said bag .