As someone who will be adjudicating this for the first time, I am interested in this debate so I can set out the expectation to my party. So, from a fantasy/magic perspective, I would think that material/objects external to the invisible subject are able to be concealed as invisible…because that’s just cool. That said, I want to rule consistently and not have to deal with other potential mechanical issues with invisibility. Is it feasible to have a material or object be complete concealed within that which is invisible and “attune” for 1 round? For example, I am invisible, I pick up a dagger and sheath it. For that round its visible but fades to invisible by my next round, as the magic engulfs it, permitting onlookers a perception check to spot my stealth momentarily. Similarly, I take a swig of liquid courage, and the ale visibly swishes in my gut for a few seconds before turning invisible. Similarly, I remove an empty potion vial from my pouch (never letting go) and pour a new liquid into it and put the source bottle down. The bottle which I pick up in touch stays visible as does the liquid. The liquid remains visible for a round at which point it turns invisible within the potion vial. The source bottle I put down remains visible.
Thoughts?