http://www.chinabaokangs.com/drinkware/Drinkware factory 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 not contain bpa and are very safe for both human body and environment. It's very convenient to clean. Just rinse it with water or wipe it with a wet rag. It has good sealing property, and you can use it to contain flavored drinks. Features 1. The product is made of food grade stainless steel and has good heat preservation effect. The cup cover is made of polypropylene and silicone gasket. 2. Ideal for school, work, travel and all sports and outdoor activities, such as hiking, cycling, camping, etc. 3. The bottom of this Double Wall Stainless Steel Insulated Water Bottle is flat, so it has good stability, and will not fall down once touched. 4. We guarante