" TO MASTER, FROM KREACHER. Harry stared at it. “D’you reckon this is safe to open?” he asked. “Can’t be anything dangerous, all our mail’s still being searched at the Ministry,” replied Ron, though he was eyeing the parcel suspiciously. “I didn’t think of giving Kreacher anything. Do people usually give their house-elves Christmas presents?” asked Harry, prodding the parcel cautiously. “Hermione would,” said Ron. “But let’s wait and see what it is before you start feeling guilty.” A moment later, Harry had given a loud yell and leapt out of his camp bed; the package contained a large number of maggots. “Nice,” said Ron, roaring with laughter. “Very thoughtful. "
― J.K. Rowling , Harry Potter and the Half-Blood Prince (Harry Potter, #6)