1.Double wall stainless steel SCHOLAR vacuum insulated flask. 2.Available model : WS-350A with strainer : 350c.c. WS-420A with strainer : 420c.c. WS-500N w/o strainer : 500c.c. 3.Elegant design for dual proposal-liquid or food container. 4.Excellent performance for keeping temperture for hours. 5.Scholar vacuum flask is available on fashion color coating, too. 6.Material: stainless steel 18/8.