http://www.chinabaokangs.com/d....rinkware/water-bottl Water Bottles suppliers Description The most important thing about a heat preservation cup is its heat preservation performance. This Double Wall Stainless Steel Insulated Water Bottle is made of food grade 18/8 stainless steel, which has good heat preservation performance. It can keep hot for 12 hours and cold for 24 hours. It is a good helper for you to drink water no matter in winter or summer. In addition, the double-layer design can well isolate the lining with hot water from the external surface, so that users will not feel hot when holding the cup. The materials used do no