Calling all Harry Potter fans! This Harry Potter Hogwarts Crest Hot Water Bottle is great for cosy evenings in, relieving stomach cramps or for warming up on a cold day. Featuring a soft black, velvet feel fabric, this hot water bottle is leak proof and great for any Harry Potter enthusiast.. 1 x Harry Potter Hogwarts Hot Water Bottle. Leak proof. H 34cm x W 20cm (approx)