... vacuum flask This kind of vacuum flask are with two covers.material:18/4 or 18/8 stainless steel (as client's request).Double walls stainless steel vacuum ... 50,000pcs. Markets and ClientsKlean Kanteen,Jcpenny,Walmart,,Costco,May,Coca Cola,Nestle,Pepsi,BBC,,Time Warner,Universal Studio etc.OEM/ODMOur ... your inquiry within 8 Hours.Call us right now! 500ml stainless steel vacuum flask with two cover