Well, what I'm proposing is a bag that... cloaks and assimilates those items inside of it in such a way that they (with the bag) could be assimilated. I asked about it with a lot of writers for Aeon on the TC discord and they suddenly agreed that actually made a lot of sense. And like you said, obviously, potentially making pockets in your flesh. But I think the bag is a wider use concept. :) And for the record, you're to thank for this idea, it never would have occurred to me without your character!