Factory profile: 1.There are 28 machines for blow molding & injection molding bottles in our factory.So mass production could be made. 2.We are OEM (original equipment manufacturer) and ODM for 9 years. 3.We are providing products and services from making the mold by ourselves to the finished products according to the customer&＃039;s needs. 4.Available for various design, color, logo, and shape. 5.Warm/ hot water bottles have different sizes, including 2.8L, 2.5L, 2L, 1.8L, 1L, 800ml, 700ml, 600ml, 550ml, 450ml, 200ml. 6.Safe, has passed anti-pressure and anti-buffering power test in our inspection room. ISO9001: 2008 and SG certificate for Japanese market. Good quality. Usage of Hot water bottles: Mainly for winter heating. First, open the water bottle cover, fill with water, then parallel to tighten the lid, Finally put it into insulative bag and place inside the quilt. It is confortable. It usually holds time of 9-12 hours. Features of hot water bottles: Mainly Export to Japan, Asian countries and so on. Safety and environmental protection, no smell, It can withstand 200KG pressure test and does not distort, watertight. Please call me directly through MY mobile.Thanks a lot. WELCOME TO VISIT OUR FACTORY.