"No, they won't crack," Sherlock said blandly as he pushed past the fake jungle plants to edge up to the river. He glanced down either side of the water, but it appeared they were alone. "The temperatures we'd be heating the water at will go exceedingly slowly as it is, and we can regulate it."

He edged right up to the water and leaned over to look down into it. "And we will need to boil it... This does not look anywhere near fit for human consumption."