I have a lot of empty bags, and sometimes I just want to carry a bag home or to other places without wasting a main slot/putting down the bags I actually use. If we could have some option (like "fold up") to change an empty bag into an item that could be placed inside a container, that problem would disappear. Then, when I want to put things in the bag, all I need to do is click on it with a main inventory slot open and select "Unfold," similar to unbundling a grain bushel.