Esbit stainless steel vacuum flask 500ml vf500ml made of high quality stainless steel double walled 2 drinking mugs 2 screw plugs with and without push button for pouring function coated inner body for especially good heat preservation size packed h 210 x 79 mm weight 359 g volume 500 ml water filling temperature 98 c environment temperature 20 c 2 c heat preservation cap after 6 hrs 75 c heat preservation cap after 12 hrs 60 c heat preservati