Sirius was about to respond when Remus pressed the ice to his lip and he let out a hiss of pain. "Stupid bloody book" Sirius said, apparently in a grumbly mood which normally meant Remus would have to baby him or just nod his head in agreement.
Reaching up to hold the bag there himself, he looked over at Remus. "Lake now?" he asked, hoping the answer to his question would be a yes.