Loki is not so self-absorbed not to notice something is happening for Mobius right now, but he doesn't think it is fair, appropriate, or particularly kind to put Mobius on the spot about it.

He can make some guesses and wait until neither of them are terrified he's going to up and vanish to ask the hard-hitting questions.

"I have, yes. There are ones, also, that don't keep you awake like coffee. Is mineral water a thing that is available?" Does Loki know much about the chemistry of carbonated beverages? Not at all.

Would he be willing to learn? Definitely.