Shoulder Strap with Metal Clip is a great way to sling a variety of bags, pouches, cameras, etc.
Adjusts from 66cm to 120cm in length.
ChicoBag rePETe Bottle Sling Bag
ChicoBag Travel Zip (Set of 3 Different Sized Zipper Bags)
Coghlan's Organizer Bags
Coghlans Compression Sack 30l