wing a shoulder strap bag which has been severed from the block according to FIG. 3, FIG. 5 is an elevation similar to FIG. 1 showing a second embodiment of a shoulder strap bag, FIG. 6 is an elevation similar to FIG. 5 showing a plurality of superimposed and joined shoulder strap bags according to the second embodiment, FIG. 7 is an elevation showing superimposed and joined twin carrying bags whi