... steel vacuum flask,thermos 400ML. double layer and vacuum. esay to take when you travel stainless steel vacuum flask ,thermosItem No: LLXSCapacity:260ml/350ml/400ml ... /450mlPacking: 30pcs/ctnMaterial: Inside #304, outside #201function:vacuum mug, keep ... Any color is availble,pls check picture vacuum flask,thermos (w)