I picked up the jar only because you'd planned to get it, and it seemed a bit rude for me to try to leave without it. (I didn't know if you were around at the time, and was essentially done talking)
I'm still just as opposed to using it as I was earlier. With reference to Nitori's problem, I don't know that an alternate cooling method would be of interest, since I think that her issue is less 'I want to way to stay cool' so much as 'I want to build a neat machine like the one I remember from my dream'. For that, I have no idea what else they could use from a Gensokyo tech point of view.
>"Well, nice seeing you, and I'll talk to you later."
>Return to the underground