Thermos Kovea Vacuum Flask KDW-WT100 1 liter. with a metal flask made of corrosion, stainless steel. It has dual automatic button-type cap with valve for easy filling and less heat loss as well as a convenient carrying case with a handle on the outside and an additional anti-corrosion coating inside. The thermos Kovea Vacuum Flask KDW-WT100 1 liter. Your warm drinks stored up to 12 hours - hot and cold to 24.