No one else was around, so it was probably Meiden who threw David the water.
"Thank you," smiled David taking the bottle. He was really pleased, and not just because he was thirsty and was given a drink. The Norwegian was quite a difficult, sometimes unpleasant man, but it seemed that he was decent nonetheless. Not such a scary devil as he seemed at first.
The boy drank in large gulps. He emptied half a bottle in one go, not really paying attention to the fact that the water was dripping from the corners of his mouth and dripping onto his sweat-wet undershirt. He set the bottle down, sighed loudly with satisfaction and wiped his face with the top of his hand. At the same moment, he noticed Meiden disappear into the outer door of his office.