bottle

lahvička
[ˈbɒtəl] "a 7 ml bottle of perfume" (7 ml lahvička parfému)
"a bottle of ink" (lahvička inkoustu)

láhev
[ˈbɒtəl] "a bottle of whisky" (láhev whisky)
"a milk bottle" (láhev od mléka)
"She unscrewed the cap of her water bottle and gave him a drink." (Odšroubovala víčko své lahve s vodou a dala mu napít.)