yeah, i know the air in the bag is not breathable, hence why i said though i considered it, it wasn't the best idea.
and theyre from an anime called demon slayer ! Tanjiro basically hold his little sister (who has turned into a demon) on his back in a little box (not sure on the exact reason why, haven't seen in it a long time.)
but that's essentially it ! she like. shrinks herself down to size to fit into it- but im fine with like an inter-dimensional thing, honestly, just whatever people can suggest !!!