"Small bottle with bittersweet gold soda inside" is a classic Italian soda flavour. This is Lurisia's take, which means mineral water from their own spring and root and herbal extracts from real plants.
Alpine gentian is a small flowering plant with a bitter root that is responsible for the bitterness in everyone's famous orange aperitivo. This one is "not too bitter" - very pleasant.
See also - the wormwood version - "small red bittersweet soda".
