Comments below clip:
I didn't open any of the boxes [because that's why I would also not do in reality], nevertheless, my character HAD to drink something, and that's something I wouldn't do either, but alas, this is a horror game, not a reality show :o]
So, we moved from room to room, carefully moving various boxes around, and left the ones without any designation where they were [hallway]. The game keeps you guessing as to what will happen next [as this is a horror game], but that'll become clear as hell toward the end.
Didn't run into any bugs, hiccups or snags, so well done and kudos to all involved!