Definitely bad if it rains.
But if it rains, it refills the bottle! Clearly a design feature. :p
EDIT:
And dumb old BOF 1...wtf. ;_; I got to the final boss, then slowly nicked-her-to-death with all my strongest characters. Got this really lame ending with her standing there taunting with an "END screen" and credits.
I was all "wow, this was a really amazing game, but the ending was so anti-climactic!" ;_; I literally went for years not knowing you have to form Agni (the merger you learned just literally prior to getting to her) with all the characters to even see the real ending. LOL >.>;;
Better late than never. :p (Btw that's not even a spoiler--please form Agni to fight the final boss...don't be like me!)