DURABLE MATERIAL:it is made from rubber.The large capacity design,Ribbed outer surface helps maintain liquid temperature. Size:10.3cm x 7.5 cm x 16cm.MULTIPLE FUNCTIONS: The hot and cold hot water bottle with wide mouth is easy to fill and use. The hot bag for pain relief. Use it for shoulder pain, medical purposes, as a feet warmer.KEEPS YOU WARM FOR HOURS:It can provide you with a warm bed after you put the hot water bottle in the bed shortly before going to bed. It is also a perfect gift.WARM DESIGN:The outer knit filling is not only attractive, but also prevents direct contacts with the skin on the surface of the hot water bottle. Each part is carefully designed.SOFT TO THE TOUCH:Pure Natural Rubber,anti-aging, longer lasting insulation,the plush jacket of the hot water bottle is smooth and comfortable.