What sort of aperitif is this? I'd liken it more to Dubonnet than sweet Vermouth, though it has a brighter, fresher berry-fruit character to Dubonnet's plush, bass heavy profile, and a more pronounced bitterness as a counterpoint. Note, though, that this is skewed more towards the sweet than the bitter, and therefore seems to me to suggest it wants dilution of some sort, whether passively by serving it over ice, or through mixing: dust off your copy of the Savoy Cocktail book for a few suggestions on how to get started if that latter course strikes your fancy.