I used an old sweat pant leg to store used plastic grocery bags. I cut one leg off at the crotch, sewed a casing (you could glue or use iron-on webbing though), string the drawstring from the same pair of sweat pants, the elastic from the other leg, or an old shoelace through the casing and tied it off to make a loop to hang my new storage leg.  The bottom already has an elastic closure. Now I can hang my leg on the back of my utility closet door and pull the bags out as I need them.