Hot water bottles are used for a plethora of reasons. Some people use them to keep warm at night, some people use them to reduce the effects of Arthritis or int pain. Whatever your reason for getting one, this one is a true helper. It is draped in nylon that feels nice against the skin. It does not need to be refilled as the water like substance is pre-filled. You simply plug it into a wall outlet for an hour or so and use it all night. It's amazing plus it comes in a variety of designs which are great to look at. Get one for yourself and one for your mum or dad. Available now!