my toads tank, can get pretty hot at times based upon the temps outside (sometimes we range in the 90s, with the ac set at about 75) averaging around 80 or so, in the reptile room (they are below a snake) (and above 2 geckos tanks.) anyways, the hot temps haven't been affecting my frogs too much. they are still active. what I am getting at, even though this species prefers colder temps. being warm every so often. shouldn't stress them out too much.

the water bottle sounds like a good idea... I have never done it before.

I wonder if making dechlorinated icecubes would be possible?