I have a few max deepened. (8m)
And many undeepened. (2.5m each, discounts on bigger orders) These weigh less than 1lb and can be deepened to 100lbs with notes/services.
Get them while supplies last. Great backup bags for transfering, item management or Duskruin loot management. I carry 2-3 on each character since they are so light.
Also turned one of mine into a spider bag. <1lb bags are rare, and this is outside the "allowed weight/capacity" restrictions for standard containers.
These are shoulder worn (can be worn with a cloak).