1.Double wall stainless steel 2.Vacuum insulation 3.wide mouth design 4.Material:18/0 ... 18/8 stainless steel is available,all according to client's request.2.Double walls stainless steel and high vaccum ... as sales,we have products,mainly such as stainless steel vacuum flask, coffee pot, mug, auto mug, sports bottle,etc.Our ... and keep a long-term cooperation!! Double wall Wide mouth S/S vacuum flask