Food grade SUS 18/8 material. keep hot for long time. any color is avaliable. dishwasher safe. FDA report by SGS. may our factory's specialist offer you professional service. Item name: Bullet shape vacuum flask1) Item No.: HR-350/500/750/10002) Capacity: 350/500/750/1000ml3) Material: food-grade double walled Strainless steel 18/8 350ml: 65 degree after 6h, 40 degree after 24h500ml: 69 degree ...