Quick clothespin bag

Bend the side ends of a wire hangar upwards, then hang a plastic grocery sack on it. Continue to bend the ends up and over the plastic bag handles to hold it in place. Use two plastic bags, one inside the other for strength.

Clothespin holder

Hanging clothes on the line outside? Make a clothespin holder from a child's pullover shirt. Just sew the bottom closed and put it on a wire hanger. You can bend the hanger to keep it from slipping off. Hang it on the clothesline and slip it along as needed.