... 3.Keeping 12hour 4.Certificate:LFGB 5.Packing with box 1.5L Double Wall Stainless Steel Vacuum FlaskStainless steel vacuum flaskDouble ... stainless steel:C 0.15max,Mn 5.5-7.5,Cr 16-18,Ni 3.5-5, N 0.25max 18 ... /8 stainless steel:C 0.08max,Mn 2.0max,Cr 18-20,Ni 8.0-10.5 3. Advantages of ... are double wall, could keep hot and cold for 24hours 1.5L Double Wall Stainless Steel Vacuum Flask