Keep warm and cosy on those long cold winter nights with one of these fabulous mini hot water bottles with removable covers. The hot water bottle cover is machine washable. The mini hot water bottle inside is approximately 24cm x 14cm and is made from natural rubber, conforming to British Standard 1970:2006. The colour of the hot water bottle supplied with this cover may vary from the colour of the bottle shown. The bottle should not be overfilled - three quarters full is the maximum recommended amount, approximately 340ml. Check out the great variety of cosy, cute and fun covered hot water bottles available in our online store - they also make ideal gifts!