Something I'd been meaning to ask/make note of, are these bags you get in-game that will only hold certain items. My g/f is running amuk in Frostfell right now, which reminded me. She got Frostfell Shopping Bags which only hold items specific to Frostfell. We see the same thing with Harvesting pouches or what not.

This will be something to consider when we get to the 'containers' implementation of our Items revamp. I know bags currently will hold whatever we put in them... but how will we determine if the bag can hold specific items? By type, I suppose?

Yah type. There might be a few odd items that I will have to figure out something for them to work, but type should take care of most of them.