350/500ml bullet vacuum flask Nice shape Certificate by FDA, LFGB Eco friendly Stainless steel bullet vacuum flask 1.Production line:2.Certification:3.Advantage and more detail:a. High quality stainless steel material (as clients' request) 18/0 (301)stainless steel:C 0.15max,Mn 5.5-7.5,Cr 16-18,Ni 3.5-5, N 0.25max 18/8 (304)stainless steel:C 0.08max,Mn 2.0max,Cr 18-20,Ni 8.0-10.5 b. Eco friendly, ...