"You can still burn in the shade, the question is how much sunlight actually makes it through the canopy."

They should really take a proper look outside soon. He takes back the water bottle, uncaps it again and takes another sip.

"How you holding up?"

His initial reply hadn't really told John anything much, so he's hoping the water and food are helping. You know, and that Ianto isn't secretly still feeling spinny or nauseous or something. He seems fine, though, maybe a little slowed down still? Mostly fine. Good enough to make jokes, which is a hopeful sign.