"Don't be absurd," Snape smirked, before confiding, "I carry all the severed shrunken body parts in my other pocket."
Snape waved away the thanks. "Not at all," he murmured. "The effects are like a long-lasting Impervius Charm: repels liquids, preserves suppleness." The smirk widened. "Therefore, do resist the temptation to dress any other ...leathers with it."