I bought this because I wanted to buy a hot water bottle "good hot water bottle" that does not smell of chemicals and is not hazardous to health. Is all well and good, the wrong has the advantage that it does not stink. However, it is hard and uncomfortable when filling it remains unfortunately almost completely. This is a shame, after a short use about 10 times they had then a hole. Now I can throw them. Too bad for the high price I would have expected more. The cover is very nice, at least he will get with.