"I think I remember there being a big pool thing, maybe you can have a swim to cool off. They don't seem like the complex plumbing type."

More than rainwater collection type, with some minimal piping to funnel it. He re-caps the bottle, holds it back towards Ianto and considers his shoes thoughtfully where he dropped them on the floor.

"Swimming does sound nice, actually."

Since John feels clammy too. Maybe they should both take a swim. He drops his eyes further down to his own t-shirt with frown, plucks at the front of it and sniffs thoughtfully. Yeah. Probably he should take a swim and... maybe rinse his t-shirt out? It'd probably dry out on its own, eventually.