... Keeping time:12hours 1200ml Double Wall Stainless Steel Vacuum Flask Double wall stainless steel. New design and more convenient to ... , 12pcs/ctnMaterial: 18/8 stainless steelCapacity: 500ml-2000ml2. 18/0 stainless steel:C 0.15max,Mn 5. ... Advantages of stainless steel vacuum flaska: Molding, soldering, Polishing, Packaging with 10 years’ Professional Technology.b: High quality stainless steel materialc: ...