flask 
/ˈflæsk, Brit ˈflɑ:sk/ noun
plural flasks /ˈflæsk, Brit ˈflɑ:sk/ noun [count] 1 : a container that is shaped like a flattened bottle and that is used to carry alcohol
▪ a flask of whiskey —called also hip flask 2 : a glass bottle used in scientific laboratories 3 Brit : thermos
▪ a flask of whiskey —called also hip flask
