vacuum flask ,keep hot or cold long time ,with double siling,it is promoation gifts for tourism or family vacuum flask1.capacity:350ml or 500ml2.material:double wall stainless steel3.packing:1pc/polybag,white box or color box4.qty/ctn:24pcs5.logo:silk-screen or heat transfer or laser engrave6.any color coating finish7.OEM and ODM vacuum flask &thermos bottle&thermos mug